Can Dogs Eat Chocolate?
No. How serious it is depends on the type, the amount and the size of the dog, and dark and baking chocolate are far worse than milk.
No. Chocolate is one of the most common poisonings vets see, and it peaks every year around Easter, Halloween, Valentine’s Day and Christmas. How serious it is depends on three things: the type of chocolate, how much was eaten, and the size of the dog. A lick of a milk chocolate bar is usually a stomach upset. A few squares of baking chocolate can be an emergency for a small dog.
If Your Dog Has Just Eaten Chocolate
Work out three things, then call: what kind of chocolate, roughly how much (keep the wrapper), and when. Then phone your vet, or one of the two US animal poison lines, which are staffed around the clock and charge a consultation fee:
- ASPCA Animal Poison Control: (888) 426-4435
- Pet Poison Helpline: (855) 764-7661
Call even if your dog seems completely fine. Signs usually take 6 to 12 hours to show, and treatment works best before they do. Do not make your dog vomit at home unless a vet tells you to: done at the wrong time, or with the wrong amount of hydrogen peroxide, it causes its own problems.
Why Chocolate Is Toxic To Dogs
Chocolate contains theobromine and a smaller amount of caffeine, two related stimulants called methylxanthines. People clear them quickly. Dogs clear theobromine very slowly, with a half-life of around 17 hours, so a dose that would give a person a mild lift keeps building in a dog’s system and acts on the heart, the nervous system and the kidneys for a day or more.
Chocolate is also rich and fatty, which can bring on vomiting, diarrhea and, in some dogs, pancreatitis a day or two later, separately from the theobromine.
Not All Chocolate Is Equal
The darker and more bitter the chocolate, the more theobromine it carries. These are typical values, and real products vary:
| Type | Theobromine per ounce | Risk |
|---|---|---|
| White chocolate | Almost none | Low for theobromine, but still fatty and sugary |
| Milk chocolate | About 45 to 60 mg | Moderate. Dose matters |
| Semisweet and dark chocolate | About 135 to 160 mg | High |
| Baking chocolate (unsweetened) | About 390 to 450 mg | Very high |
| Dry cocoa powder | About 400 to 740 mg | Very high |
| Cocoa bean mulch (garden) | Varies widely, up to about 900 mg | High, and dogs like the smell |
How Much Is Dangerous
Mild signs such as vomiting, diarrhea and restlessness can start at around 20 mg of theobromine per kilogram of body weight. Heart effects appear at around 40 to 50 mg per kilogram, and seizures become possible from around 60 mg per kilogram. Translated into chocolate, the approximate amount at which mild signs can start looks like this:
| Dog weight | Milk | Dark | Baking |
|---|---|---|---|
| 10 lb | 1.8 oz | 0.6 oz | 0.2 oz |
| 20 lb | 3.6 oz | 1.2 oz | 0.4 oz |
| 40 lb | 7 oz | 2.4 oz | 0.9 oz |
| 70 lb | 12.5 oz | 4.2 oz | 1.5 oz |
For scale, a standard milk chocolate bar is about 1.5 ounces. So a 10 lb dog that eats one is right at the threshold, and a 10 lb dog that eats a dark chocolate bar is well past the point where the heart gets involved. Treat this table as a reason to call, not a reason to wait: products vary, dogs vary, and a vet can do the sum properly with the wrapper in hand.
Signs Of Chocolate Poisoning
Usually within 6 to 12 hours, and they can last up to three days because of how slowly dogs clear theobromine:
- Vomiting and diarrhea, sometimes smelling of chocolate
- Restlessness, pacing, hyperactivity
- Heavy panting and drinking more than usual, then peeing more
- A racing or irregular heartbeat
- Muscle tremors, stiffness, and in severe cases seizures and collapse
What The Vet Will Do
If the chocolate was eaten recently, the vet will usually make your dog vomit, which can still be worthwhile several hours later because chocolate sits in the stomach. Activated charcoal is often given, sometimes in repeated doses, to stop more theobromine being absorbed. Dogs with signs may need IV fluids, heart monitoring and medication to control the heart rate or tremors. With prompt treatment most dogs recover fully.
Where Dogs Actually Find It
- Holiday stashes: advent calendars, Easter eggs, Halloween candy bags and wrapped gifts under the tree. Dogs will open wrapping paper.
- Baking: cocoa powder and baking chocolate are the most concentrated forms, and brownies are made from them.
- Bags and coats: a candy bar left in a handbag on the floor.
- Garden mulch made from cocoa bean shells.
- Chocolate with extras: macadamia nuts, raisins or xylitol-sweetened “sugar free” chocolate each add a second poison. See our guides to macadamia nuts, grapes and raisins and xylitol.
Carob And Dog Treats Labeled Chocolate
Dog treats that look like chocolate are made with carob, which contains no theobromine and is safe. The treat is fine; the habit of handing your dog something brown and sweet is worth thinking about if there are children in the house who might share their own.
The Short Answer
Never give a dog chocolate on purpose, and treat any accidental amount as a phone call rather than a wait and see. For everything else your dog might get hold of, the food checker gives a straight answer on 115 foods.
In The Kibble reads labels and publishes what the numbers say. Guides are general information, not veterinary advice. Your vet knows your dog's history and we do not, so take anything here to them before you change how you feed.