Winter Pet Care & Poisoning
What to Do If Your Pet Is Poisoned
Don’t panic. Rapid response is important, but panicking can interfere with the process of helping your pet.
Take 30 to 60 seconds to safely collect and have at hand any material involved. This may be of great benefit to your vet and/or APCC toxicologists, as they determine what poison or poisons are involved. In the event that you need to take your pet to a local veterinarian, be sure to take the product’s container with you. Also, collect in a sealable plastic bag any material your pet may have vomited or chewed.
If you witness your pet consuming material that you suspect might be toxic, do not hesitate to seek emergency assistance, even if you do not notice any adverse effects. Sometimes, even if poisoned, an animal may appear normal for several hours or for days after the incident.
SIGNS & SYMPTOMS
The signs and symptoms of antifreeze poisoning are time dependent, meaning that certain symptoms will be noticeable based on how much time has passed since consumption. The following are organized by the time frame of thought consumption of EG.
Within the first 12 hours:
- Depression
- Vomiting
- Increased water consumption
- Stumbling or wobbling
- Hyper-excitability
- Not eating
- Seizure activity may be observed
During this phase of poisoning your pet may exhibit characteristics similar to someone who is drunk.
Within 24 hours:
All of the above symptoms can be exaggerated by this point. During this time the cardiovascular system is affected, causing in addition to the above list:
- Rapid breathing
- Panting
Within 72 hours
At this point the kidneys have suffered a great deal of damage and the likelihood that kidney failure will occur is almost definite.
- Marked Depression
- Stumbling or generally uncoordinated when walking
- Severe vomiting and diarrhea
- Dehydration
- Various forms of paralysis
- Decreased motor function
POISONING
National Animal Poison Control Center (NAPCC)
1-900-680-0000
$45 per case, billed to your phone.
- A dog is not a 4-legged human. The NAPCC staff is all veterinary health professionals who have been trained in animal toxicology. Because of their training, they are prepared to deal with the complexities of a poisoned dog.
- Assistance is provided to both veterinarians and pet owners. The center is staffed around the clock by veterinary professionals. In the case of certain chemical exposures, the manufacture of the chemical/product may pay the caller’s NAPCC charges. NAPCC will make follow-up call(s) as needed.
- Watch for any changes in color (skin and in mouth) and respiration, excessive salivation or dryness, diarrhea, heaving, vomiting, extreme restlessness or lethargy. Do NOT try to induce vomiting or ingestion without first consulting a veterinarian or poison control center.
When calling, have the following information available:
- Your name and phone number
- Age of dog
- Weight of dog
- Physiologic condition (i.e. neutered, pregnant, lactating, health disorders, etc.)
- Name of the product and manufacturer
- Active ingredient and concentration listed on the label
- Formulation of the product (i.e. solid, liquid, aerosol)
- Amount of product the dog was exposed to
- Time elapsed since exposure
- Any symptoms observed (drooling, vomiting, difficulty breathing, etc.)
- Time between exposure and onset of symptoms
The first step in treatment is to eliminate the poison from your dog’s stomach by making it vomit. The second step is to delay absorption of the poison from the dog’s intestinal tract by coating it with a substance that binds it. This is followed by a laxative to speed elimination.
Note: Do not induce vomiting or give charcoal by mouth if your dog is severely depressed, comatose, unable to swallow or experiencing seizures.
Your veterinarian will most likely admit your pet to the hospital and provide the following:
- Administer emetic drugs to induce vomiting.
- Administer activated charcoal – this gives the toxin something to bind to, so as to slow down the absorption process for the body.
- Administer i.v. fluids to include sodium bicarbonates to not only control dehydration but also to balance hydration.
- Administer Fomepizole – this is the drug of choice when treating EG poisoning. This product is given intravenously and it stops any further metabolizing of the Ethylene Glycol.
- Provide an extensive amount of nursing care to keep your pet comfortable through the treatment process.
The prognosis will depend on how much time has lapsed before treatment began and of course how much antifreeze was consumed. You can expect your pet to stay in the hospital for several days to several weeks, and it is not uncommon for a veterinarian to transfer an antifreeze case to a specialty hospital to complete treatment.
How to Delay or Prevent Absorption
1. Mix activated charcoal (one tablet to 10-cc water). Give one teaspoonful per two pounds body weight and follow with a pint of water. Depending upon the dog’s condition, this may need to be given by stomach tube. Veterinary assistance usually is required.
2. Thirty minutes later, give sodium sulphate (Glauber’s salt), one teaspoonful per ten pounds body weight, or Milk of Magnesia, one teaspoonful per five pounds body weight.
Note: If these agents are not available, coat the bowel with milk, egg whites or vegetable oil and give a warm water enema.
If your dog has a poisonous substance on the skin or coat, wash it well with soap and water or give a complete bath in lukewarm (not cold) water, as described in the SKIN chapter. Even if the substance is not irritating to the skin, it should be removed. Otherwise, the dog may lick it off and swallow it. Soak gasoline and oil stains with mineral or vegetable oil. Work in well. Then wash with a mild detergent, such as Ivory soap.
When signs of nervous system involvement begin to show, the dog is in deep trouble. At this point, your main objective is to get your dog to a veterinarian as quickly as possible. Try to bring with you a sample of vomitus, or better yet the poison in its original container.
How to take a dog’s temperature
If you suspect your dog is sick then taking your dog’s temperature is important. It is not difficult, but it is a task best performed with two people. Have someone hold the dog still, preferably someone the dog knows and likes.
- Apply petroleum jelly to the head or bulb of a rectal thermometer.
- Slowly slide the thermometer into the dog’s rectum about 1 inch deep.
- Wait 2 minutes for a mercury thermometer.
Remove slowly and read the thermometer. Shake down the thermometer and clean it after every use.
A dog’s normal body temperature ranges between 100.5 Fahrenheit (38.1°C) and 102.5 Fahrenheit (39.2°C).
A dog’s temperature below 99 degrees Fahrenheit (37.2°C) and temperatures above 104 degrees Fahrenheit (40°C) are considered extremely serious and your dog should be brought to a veterinarian immediately.
Resting Heart Rate
Of the three vital signs, the resting heart rate for dogs shows the greatest variation. Unlike humans, the heart rate of dogs varies widely based on the size of the breed.
- Large-breed dogs (Newfoundlands, Great Pyrenees, Rottweilers, Golden Retrievers, and similar size breeds over 50 pounds) have a normal rate of 70 to 120 beats per minute.
- Medium dogs (Border Collies, Cocker Spaniels and other breeds weighing 25 to 50 pounds) have a normal rate of 80 to 120 beats per minute.
- Small dogs (Miniature Poodles, Boston Terriers, Miniature Schnauzers and other breeds between 10 and 25 pounds) have a normal rate of 90 to 140 beats per minute.
- Toy dogs (Chihuahuas, Maltese and Yorkshire Terriers, and others under ten pounds) have a normal rate of 100 to 160 beats per minute.
Place a clock or watch with a second hand on a chair or table near you. Stand over your dog, with his head facing away from you. Place both hands on his ribs, below his elbows. Move your hands until you can feel his heartbeat easily.
Count the number of beats in a 15 second period, then multiply by four. Or count for 30 seconds and multiply by two.
While you’re checking, also practice taking his pulse from other places. If he’s ever ill and unable to stand, you won’t be able to use the above method.
Other locations where you can check his pulse are the sides of his neck, on the inner thighs of his hind legs, and on his lower front legs, which is the equivalent of your wrists.
Resting Respiratory Rates for Dogs
The normal respiratory rate for a dog ranges from 15 to 30 breaths per minute. It’s easy to count your dog’s breathing rate. With a clock or watch with a second hand, count the number of breaths for one minute.
Do not, however, try to count his breaths when he’s panting — it doesn’t count as breaths. Panting occurs when he’s hot, short of breath, excited or in pain.
Some breeds pant more than others:
Dogs with heavy coats pant more when it’s warm. Dogs with pushed-in faces, such as Pugs and English Bulldogs, pant more than other breeds. The shape of their faces forces them to work harder to get air in and out of their lungs.
These three vital signs — normal temperature, resting heart rate, and resting respiratory rate — are important indicators of good health and health issues. Don’t delay in learning what your dog’s baseline vital signs are.
If you don’t feel comfortable testing for the baseline numbers of these vital signs, ask your vet to provide you with the numbers, or ask her to show you how to check for them yourself.
As soon as you have the vital signs, record them and store a copy of them in your dog first aid kit and in the information and records you keep in the evacuation kit you make for your dog.
Petroleum Products (Gasoline, Kerosene, Turpentine)
These volatile liquids can cause pneumonia if aspirated or inhaled. The signs of toxicity are vomiting, difficulty of breathing, tremors, convulsions and coma. Death is by respiratory failure.
Treatment: Do not induce vomiting. Administer an ounce or two of mineral oil, olive oil or vegetable oil by mouth; then follow it in thirty minutes with Glauber’s salt. Be prepared to administer artificial respiration.
Antifreeze (Ethylene Glycol)
Poisoning with antifreeze is not uncommon because ethylene glycol has a sweet taste that appeals to dogs and cats. In dogs, a toxic dose is one half teaspoonful per pound body weight.
Signs of toxicity, which appear suddenly, are vomiting, uncoordinated gait (seems “drunk”), weakness, mental depression, coma and death in twelve to thirty-six hours. Convulsions are unusual. Dogs that recover from the acute phase may have damage to the kidneys and go on to kidney failure.
Treatment: Induce vomiting. Coat the bowel to prevent further absorption. Intensive care in an animal hospital may prevent kidney complications.
Garbage Poisoning (Food Poisoning)
Food poisoning is common, as dogs are notorious scavengers and come into contact with carrion, decomposing foods, animal manure and other noxious substances (some of which are listed in DIGESTIVE SYSTEM: Common Causes of Diarrhea). Signs of poisoning begin with vomiting and pain in the abdomen; they are followed in severe cases by diarrhea (often bloody) in two to six hours. If the problem is complicated by bacterial infection, shock may develop. Mild cases recover in a day or two.
Treatment: Induce vomiting. Afterward, coat the intestines to delay or prevent absorption. The condition may require antibiotics. (See also NERVOUS SYSTEM: Botulism.)
Chocolate Poisoning
All dogs like chocolate, but chocolate can be dangerous. Chocolate contains a caffeine like alkaloid called theobromine. While not toxic to people in the amounts present in commercial foods, theobromine in these amounts can be quite harmful to the dog.
Signs of chocolate toxicity occur within hours after the dog ingests the chocolate. They include vomiting, diarrhea, increased heart rate, rapid breathing, muscle tremors, seizures and coma.
A small dog weighing five to ten pounds can die after eating four to sixteen ounces of milk chocolate; a medium-sized dog weighing twenty to forty pounds can die after eating sixteen to thirty-two ounces; a larger dog after eating about two pounds. Individual variations do occur. Unsweetened chocolate (used for baking) contains higher concentrations of theobromine and is therefore more toxic. A large dog can die after eating just four ounces.
Use these treatments if your dog is showing symptoms of having recently ingested a large amount of chocolate. However, avoid using these treatments on dogs that are having seizures. In either case, call or take the dog to the vet immediately.
Make a 1-to-1 solution of 3 percent standard hydrogen peroxide (H2O2) and water.
Give your pet the appropriate amount: For every 10 lbs. of your dog’s body weight, give 1 tbsp. peroxide/water solution. For example, a 20-lb. dog will need 2 tbsp. peroxide/water solution.
Pour the peroxide/water solution into a turkey baster and squirt it into your dog’s mouth to induce vomiting.
Watch for vomiting.
Wait another 10 minutes if the dog has not vomited in 5 minutes. If your dog has not vomited after the full 15 minutes, re-administer the peroxide/water solution using the same dosage.
Administer 1/4 tsp. ipecac to your dog as an alternative way to induce vomiting.
Avoid giving a third dosage of peroxide/water solution or ipecac if your dog still has not vomited, as that could be dangerous.
Call the ASPCA National Animal Poison Control Center at (888) 4ANIHELP or (800) 548-2423. Be prepared to pay a consulting fee.
Don’t feed your dog chocolates. To prevent accidental ingestion, keep chocolate candy in the refrigerator.
Corrosives (Acid and Alkali)
Corrosives and caustics are found in household cleaners, drain decloggers and commercial solvents. They cause burns of the mouth, esophagus and stomach. Severe cases are associated with acute perforation, or late stricture, of the esophagus and stomach.
Treatment: If acid is ingested, rinse out your dog’s mouth. Give an antacid (Milk of Magnesia or Pepto-Bismol) at the rate of one to two teaspoons per five pounds body weight. If an alkali, use vinegar or lemon juice. Vinegar is mixed one part to four parts of water. The amount to give is judged by the size of the dog. Do not induce vomiting; this could result in rupture of the stomach or burns of the esophagus.
Toad Poisoning – Since all toads have a bad taste, dogs who mouth them slobber, spit and drool. In southern states a tropical toad (Bujo marinus) secretes a potent toxin that appears to affect the heart and circulation of dogs, bringing on death in as short a time as fifteen minutes. There are twelve species of Rufo toads worldwide.
Symptoms in dogs depend upon the toxicity of the toad and the amount of poison absorbed. Signs vary from merely slobbering to convulsions and death.
Treatment: Flush your dog’s mouth out with a garden hose and attempt to induce vomiting. Be prepared to administer artificial respiration.
People Medicines
Veterinarians frequently are called because a dog has swallowed pills intended for the owner, or has eaten too many dog pills. (Some dog pills are flavored to encourage dogs to eat them.) Drugs most often involved are antihistamines, sleeping pills, diet pills, heart preparations and vitamins.
Treatment: Induce vomiting
Emergency Pet First Aid Kit items to keep on hand
You may benefit by keeping a pet safety kit and other items on hand for emergencies. Such a kit should contain:
- A fresh bottle of hydrogen peroxide 3% (USP) to induce vomiting.
- Milk
- Vinegar or lemon juice
- Milk of Magnesia
- Charcoal
- Can of soft dog food
- Turkey baster, bulb syringe or large medicine syringe, (to administer peroxide)
- Saline eye solution to flush out eye contaminants
- Artificial tear gel to lubricate eyes after flushing (Bion Tears/Visco Tears)
- Mild grease-cutting dishwashing liquid in order to bathe an animal after skin contamination
- Rubber gloves to prevent you from being exposed while you bathe the animal
- Forceps to remove stingers
- Muzzle to keep the animal from hurting you while it is excited or in pain
- Pet carrier to help carry the animal to your local veterinarian
K9 FIRST AID KIT
A good canine first aid kit is an absolute must. The following is a list of items that you might want to consider for your own first aid kit. Most can be found either in your neighborhood pharmacy or ordered from a number of different pet mail order catalogs.
- A plastic fishing tackle box makes a great, portable kit. Don’t buy it until you have assembled your contents so you don’t end up with a box that is too small.
- Consider keeping a second kit in your car.
- Tape an index card inside the lid with telephone numbers and open hours of your regular veterinarian, emergency clinic and Poison Control Center. Keep an up-to-date list of your dog’s medications.
- Clearly LABEL all medications and supplies with their name and expiration date.
- Go through your kit TWICE a year (at a minimum), replacing expired medications, replenishing used supplies, checking for broken or leaking containers etc. Replace as needed.
MISC.
- Telephone numbers (regular veterinarian, emergency clinic and Poison Control Center)
- Latex gloves
- Zip lock bags (for specimens)
- Penlight or flashlight
- Blanket (to carry and wrap an injured dog)
- Rubbing alcohol (use only for sterilizing objects)
- Book on canine first aid
Read & be familiar with your manual. An emergency is NOT the time to begin reading the book! A good manual is published by the American Red Cross — “Pet First Aid for Cats & Dogs”
TOOLS
- Muzzle
- Rectal thermometer
- Scissors – blunt tip
- Tweezers
- Cotton swab sticks
- Cotton balls or roll cotton
- Instant ice pack
- Nail clippers
- Eye dropper
- Magazine – for quick splint
- Wooden paint mixing stick – for quick splint
- Elizabethan collar
- Magnifying glass
- Oral dose syringes (You don’t need the needles. Make sure you understand the volume markings. The syringe lets you administer fluids in specific volumes by squirting between the dog’s teeth near the back of mouth.)
DRESSINGS
- Sterile gauze (roll and pads 2″ & 4″ – no stick variety)
(rolls also can be used for an emergency muzzle) - Adhesive tape – 1″
- Vetrap 2″ or 4″ wide (by the 3M company. These are self adhering bandage rolls, they come in great colors and can be wrapped around a limb. It sticks to itself without adhesive tape. Does not stick to the dog’s hair so it is easy to remove. Be careful not to apply it too tightly – it is elasticized and will not loosen up once applied.)
- Skin glue
MEDICATIONS
- Buffered aspirin (NOT Tylenol which is toxic to dogs)
- Sterile saline solution or eye wash (for cleaning wounds or rinsing eyes)
- Neosporin
- Hydrocortisone creme
- Betadine
- Iodine (to disinfect minor wounds)
- Benadryl (an antihistamine to help if your dog has an allergic reaction or insect bites/stings.)
- KY jelly (to lubricate thermometer, also use to cover an open sore or wound. Don’t use vaseline, it is not water soluble but KY Jelly is.)
- Hydrogen peroxide – 1% solution (can also induce vomiting)
- Pedialyte
- Rescue Remedy
- Quick Stop for nails
- Kaopectate – for diarrhea
- Milk of Magnesia – for antacid, laxative
HOUSEHOLD ITEMS HANDY FOR FIRST AID
- Empty plastic bucket for holding warm water
- Paper cups for washing wounds
- Sanitary napkins for compress to control bleeding
- Table leaf as an emergency stretch
EPI K9 EMERGENCY KIT
- Keep an emergency kit in your house as well as in your car.
- A small tool box or shoe box makes a handy kit.
- Tape an index card inside the lid with telephone numbers and open hours of your regular veterinarian and emergency clinic. Keep an up-to-date list of your dog’s medications.
- Keep your dog’s seizure log book handy.
- Clearly label all medications and supplies with their name.
- It is advisable for a second person in the household to know what to do in case you are unavailable. If you use a pet-sitter, make certain they are thoroughly educated on your dog’s normal as well as emergency care needs.
- BEFORE an emergency, make sure your vet has given you correct dosing information about PB and/or Diazepam to use following a seizure or cluster. Each time your pick up a prescription, check it! Make sure it is correct.
- BEFORE an emergency, practice with the equipment and a substitute for the Diazepam (such as plain water) to feel at ease with its use. Your vet can give you proper instruction. It may be a good idea to have a “seizure drill” while everything is calm to be sure your plans are manageable. Plan ahead, for instance, how you would move/transport a large dog to a emergency clinic.
- After each emergency, check the kit for medications or supplies which need to be replenished. Make sure prescriptions have refills available.
Items that you might want to consider for your own emergency kit:
- Phenobarbital (PB)
- Oral Diazepam tablets (brand name is Valium)
- Rectal Diazepam liquid (brand name is Valium)
- Rescue Remedy or similar homeopathic blend (a Bach flower essence which helps many dogs recover from post-ictal symptoms)
- Syringe
- Syringe needles (needle NOT used for administering Diazepam)
- Plastic extender tip for syringe
OR - Tom cat catheter
- KY jelly
- Pill splitter
- Extra syringe, needle and bottle (to practice filling syringe)
Useful household items to have on hand:
- Old towels, rags or diapers (to clean up if your dog voids his bladder or bowel during a seizure)
- Heavy blanket (can be used to transport to a clinic a seizuring dog that cannot stand or walk)
- Baby gate (to block off hazards from a recovering, ataxic dog or to block other dogs from a seizuring dog)
- Extra mats or pillows (they may need to be changed if soiled during a seizure)
- Electric fan (to help cool a seizuring dog)
- Rescue Remedy, Honey, molasses, or Breyer’s natural vanilla ice cream (these foods help some dogs recover more quickly after a seizure)
People Foods to Avoid Feeding Your Pets
Chocolate, Macadamia nuts, avocados…these foods may sound delicious to you, but they’re actually quite dangerous for our animal companions. Our nutrition experts have put together a handy list of the top toxic people foods to avoid feeding your pet. As always, if you suspect your pet has eaten any of the following foods, please note the amount ingested and contact your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435.
Chocolate, Coffee, Caffeine
These products all contain substances called methylxanthines, which are found in cacao seeds, the fruit of the plant used to make coffee and in the nuts of an extract used in some sodas. When ingested by pets, methylxanthines can cause vomiting and diarrhea, panting, excessive thirst and urination, hyperactivity, abnormal heart rhythm, tremors, seizures and even death. Note that darker chocolate is more dangerous than milk chocolate. White chocolate has the lowest level of methylxanthines, while baking chocolate contains the highest.
Chocolate Toxicity
Levels of Theobromine in Chocolate
Concentration of Theobromine varies with the formulation of the chocolate
- Milk chocolate has 44mg/oz (154mg/100gm)
- Semisweet chocolate has 150 mg/oz (528mg/100gm)
- Baking chocolate 390mg/oz (1365 mg/100gm)
The theobromine in candies consisting of chocolate that is coated over some other substance – as in filled candies and chocolate coated dried fruits, etc will be more dilute than that in pure chocolate bars and solid chocolate candies.
Things like Oreos and other chocolate cookies, or chocolate ice cream, contain only a tiny bit of real chocolate. Candybars that are covered in chocolate have only slightly more. Hershey’s kisses are milk chocolate, but a few aren’t usually dangerous for larger dogs. Good chocolate bars and bittersweet chocolate are risky. I’ve been known to share my oreos and chocolate chip cookies now and then.
There is also some evidence that the effect (at least in some dogs) can be cumulative. While one incident may not be dangerous for your dog, letting them eat chocolate over time can lead to issues.
IF YOU HAVE ANY CONCERNS, CALL YOUR VET!!!! If your dog is acting strangely (very energetic, or listless, throwing up, breathing quickly, or pacing, or showing signs of pain), call immediately!
Toxic Amounts of Chocolate
Dog's Amount of Amount of Approx. Mg. Weight Milk Choc Unsweet. Choc Theobromine 5 lb. 4 oz. .5 oz. 200 10 lbs. 8 oz. 1.0 oz. 400 20 lbs. 1 lb. 2.5 oz. 900 30 lbs. 2 lbs. 3.25 oz. 1300 40 lbs. 2.5 lbs. 4.5 oz. 1800 50 lbs. 3 lbs. 5.5 oz. 2250 60 lbs. 4 lbs. 7.0 oz. 2700 70 lbs. 5 lbs. 8.5 oz. 3400
in metrics:
Dog's Amount of Amount of Approx. Mg. Weight Milk Choc Unsweet. Choc Theobromine 2.2 kg. 113.4 g. 14.1 g. 200 4.5 kg. 226.8 g. 28.3 g. 400 9.0 kg. 453.6 g. 70.8 g. 900 13.6 kg. 907.2 g. 92.1 g. 1300 18.0 kg. 1.134 kg. 127.5 g. 1800 22.6 kg. 1.360 kg. 156.0 g. 2250 27.2 kg. 1.814 kg. 198.4 g. 2700 31.7 kg. 2.268 kg. 240.9 g. 3400
Animals often have a “sweet tooth” too
Just like their human counterparts, pets, especially dogs, can crave the delicious goodness of chocolate. While recent studies have shown that chocolate may be beneficial for our health, it is important to know that chocolate can be toxic, and sometimes even fatal, for animals.
Dogs are most commonly affected, due to their ability to find it and the common ’sweet tooth’ they seem to have. It is important to remember that cats and other species are susceptible to the toxic effects of chocolate, too.
What makes chocolate toxic, anyway?
Chocolate is made from the fruit (beans) of the cacao tree. Theobromine, a component of chocolate, is the toxic compound in chocolate. (Caffeine is also present in chocolate, but in much smaller amounts than Theobromine.) Both Theobromine and Caffeine are members of a drug class called Methylxanines.
Theobromine and caffeine effects on the body:
- Central Nervous System (CNS) stimulant
- Cardiovascular stimulant
- Increase blood pressure (mild)
- Nausea and vomiting
Are some chocolates more toxic than others?
Yes. Unsweetened (baker’s) chocolate contains 8-10 times the amount of Theobromine as milk chocolate. Semi-sweet chocolate falls roughly in between the two for Theobromine content. White chocolate contains Theobromine, but in such small amounts that Theobromine poisoning is unlikely. Caffeine is present in chocolate, but less than Theobromine.
Quick Guide for Theobromine levels in different types of chocolate:
From The Merck Veterinary Manual, here are approximate Theobromine levels of different types of chocolate:
- Dry cocoa powder = 800 mg/oz
- Unsweetened (Baker’s) chocolate = 450 mg/oz
- Cocoa bean mulch = 255 mg/oz
- semisweet chocolate and sweet dark chocolate is = 150-160 mg/oz
- Milk chocolate = 44-64 mg Theobromine per oz chocolate
- White chocolate contains an insignificant source of methylxanthines.
Source: Merck Veterinary Manual Online
How much is too much?
The toxic dose of Theobromine (and caffeine) for pets is 100-200mg/kg. (1 kiliogram = 2.2 pounds). However, various reports by the ASPCA (American Society for the Prevention of Cruelty to Animals) have noted problems at doses much lower than this – i.e. 20mg/kg.
Translated to a “typical” scenario, and using the 20mg/kg as a measure of “problems can be seen at this level of ingestion”, a 50 pound dog would have to consume 9 ounces (+/-) of milk chocolate to consume the 20mg/kg amount of Theobromine. Some dogs won’t see problems at this rate. Some may.
This is a much more conservative toxic level calculation than the “standard” of 100-200mg/kg, but better safe than sorry. A dog sneaking a couple M&M’s shouldn’t have a problem, but it isn’t a good habit to get into!
What are the signs of toxicity?
Signs are most commonly seen within 12 hours (or less) of chocolate ingestion.
- Excitement / nervousness / trembling
- Vomiting / diarrhea
- Excessive thirst / sometimes excessive urination (at higher levels of Theobromine toxicity)
- Muscle spasms
- Seizures
- Coma (rare
- Death (rare) — likely due to heart rhythm abnormalities.
How is chocolate toxicity treated?
If you suspect that your pet has eaten chocolate (more than the stray chocolate chip that fell on the floor), call your veterinarian for advice. The toxicity of Theobromine is dose dependent. This means that the size of your pet, the type of chocolate, and quantity of chocolate determine if or how toxic it is for your pet.
There is no specific antidote for Theobromine toxicity. Medical treatmentis supportive, and may include all or some of the following:
- IV fluids – to prevent dehydration from vomiting, diarrhea, and /or increased urination, and to “flush” the Theobromine out of the system.
- Emetics – medications that induce vomiting. Used when the ingestion of chocolate is within 4 hours. Up to 6-8 hours post chocolate ingestion may be effective.
- Activated charcoal – for ingestion greater than 4 hours prior to treatment, or for patients that show continued signs of toxicity.
- Anti-seizure medications – for patients having seizures and/or muscle tremors.
- Cardiac medications – for patients exhibiting irregular heart rates or rhythms.
Why isn’t chocolate toxic to humans?
Humans can break down and excrete Theobromine much more efficiently than dogs. The half life of Theobromine in the dog is long; approximately 17.5 hours.
Keep your pet’s best interests at heart…chocolate wasn’t meant to be shared anyway (grin).
Alcohol
Alcoholic beverages and food products containing alcohol can cause vomiting, diarrhea, decreased coordination, central nervous system depression, difficulty breathing, tremors, abnormal blood acidity, coma and even death.
Avocado
The leaves, fruit, seeds and bark of avocados contain Persin, which can cause vomiting and diarrhea in dogs. Birds and rodents are especially sensitive to avocado poisoning, and can develop congestion, difficulty breathing and fluid accumulation around the heart. Some ingestions may even be fatal.
Macadamia Nuts
Macadamia nuts are commonly used in many cookies and candies. However, they can cause problems for your canine companion. These nuts have caused weakness, depression, vomiting, tremors and hyperthermia in dogs. Signs usually appear within 12 hours of ingestion and last approximately 12 to 48 hours.
Grapes & Raisins
Although the toxic substance within grapes and raisins is unknown, these fruits can cause kidney failure. In pets who already have certain health problems, signs may be more dramatic.
Yeast Dough
Yeast dough can rise and cause gas to accumulate in your pet’s digestive system. This can be painful and can cause the stomach or intestines to rupture. Because the risk diminishes after the dough is cooked and the yeast has fully risen, pets can have small bits of bread as treats. However, these treats should not constitute more than 5 percent to 10 percent of your pet’s daily caloric intake.
Raw/Undercooked Meat, Eggs and Bones
Raw meat and raw eggs can contain bacteria such as Salmonella and E. coli that can be harmful to pets. In addition, raw eggs contain an enzyme called avidin that decreases the absorption of biotin (a B vitamin), which can lead to skin and coat problems. Feeding your pet raw bones may seem like a natural and healthy option that might occur if your pet lived in the wild. However, this can be very dangerous for a domestic pet, who might choke on bones, or sustain a grave injury should the bone splinter and become lodged in or puncture your pet’s digestive tract.
Xylitol
Xylitol is used as a sweetener in many products, including gum, candy, baked goods and toothpaste. It can cause insulin release in most species, which can lead to liver failure. The increase in insulin leads to hypoglycemia (lowered sugar levels). Initial signs of toxicosis include vomiting, lethargy and loss of coordination. Signs can progress to recumbancy and seizures. Elevated liver enzymes and liver failure can be seen within a few days.
Onions, Garlic, Chives
These vegetables and herbs can cause gastrointestinal irritation and could lead to red blood cell damage. Although cats are more susceptible, dogs are also at risk if a large enough amount is consumed. Toxicity is normally diagnosed through history, clinical signs and microscopic confirmation of Heinz bodies. An occasional low dose, such as what might be found in pet foods or treats, likely will not cause a problem, but do NOT give your pets large quantities of these foods.
Milk
Because pets do not possess significant amounts of lactase (the enzyme that breaks down lactose in milk), milk and other milk-based products cause them diarrhea or other digestive upset.
Salt
Large amounts of salt can produce excessive thirst and urination, or even sodium ion poisoning in pets. Signs that your pet may have eaten too many salty foods include vomiting, diarrhea, depression, tremors, elevated body temperature, seizures and even death. In other words, keep those salty chips to yourself!


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