Chocolate, particularly dark chocolate, is toxic to dogs, due to its theobromine and caffeine content. Chocolate is dangerous for dogs because they do not metabolise theobromine and caffeine, both present in chocolate, as effectively as humans.
If your dog ate chocolate, contact your emergency vet immediately. Use our calculator to learn how it will affect your dog.This is because the darker chocolate is more toxic, so a smaller amount would still result in toxicity. Why Isn't Chocolate Toxic to Humans?
Chocolate is toxic to dogs, and depending on the type and amount of chocolate consumed and the weight of your dog, it could cause a serious medical emergency. But what should you do if your dog ate chocolate? Key Points.

How much chocolate is toxic to dogs? The toxic amount depends on the type of chocolate and your dog's weight. As little as 0.1 ounces of baking chocolate per pound of body weight can cause severe symptoms.
Factors That Affect Chocolate Toxicity in Dogs. Not every dog reacts to chocolate the same way. Several key factors determine how dangerous the situation may be. Type of Chocolate Consumed. The darker and more bitter the chocolate, the higher the risk.

What are the chocolate toxicity signs in pets?Diagnosing chocolate toxicity in pets. If you know your pet has consumed chocolate, dont wait for clinical signs to appear. If advised or supervised by your veterinarian, rapid decontamination can prevent or minimize toxicity signs.
The signs of chocolate toxicity are usually seen within the first 24 hours after ingestion. Sometimes their onset can vary from as early as 4 hours to as late as 72 hours after the fact. When to see your registered vet. Is any amount of chocolate toxic to dogs and cats?
The darker chocolate, like cooking chocolate and dark chocolate, is by far the most toxic with as little as 5-10 grams causing a potentially severe reaction or even death in a small dog. Even baked goods made with cocoa powder or cocoa nibs can be very hazardous.