How Much Chocolate Is Toxic to Dogs?

Dogs are not supposed to eat chocolate, but many dogs do eat chocolate anyway. The reason why a dog shouldn’t eat chocolate is that it contains an alkaloid called theobromine, which is toxic to dogs and other animals. Theobromine belongs to a class of chemicals known as methylxanthines. Caffeine is also a methylxanthine and works in the same way as theobromine, but caffeine’s effects don’t last as long because it gets broken down by the body more quickly.

However, how much chocolate is toxic? How much can a dog eat before it becomes ill or dies? That depends on several factors, including what type of chocolate was ingested and how big the dog is. So let’s take an in-depth look at this question of how much chocolate will seriously hurt or kill your furry friend:

Chocolate can be poisonous to dogs.

Chocolate can be poisonous to dogs, but it depends on the type of chocolate and the amount consumed. There are two chemicals in chocolate that can cause problems for dogs: caffeine and theobromine. Both of these chemicals are found in small amounts in other foods as well.

Chocolate contains caffeine, which is a stimulant similar to amphetamine. Theobromine is another stimulant that can cause vomiting or diarrhea when ingested by dogs. Dogs who ingest large quantities of chocolate may experience seizures, heart arrhythmias (irregular heartbeats), tremors or muscle twitches—all symptoms of acute toxicity from chocolate ingestion.

Different types of chocolate pose different degrees of toxicity.

Different types of chocolate pose different degrees of toxicity. Cocoa powder is the least toxic, dark chocolate is more toxic and milk chocolate is even more toxic than that. White chocolate isn’t actually considered a type of chocolate at all, but because it contains cocoa butter it can still be dangerous to your dog. Chocolate chip cookies are also very dangerous as they contain both brown sugar and flour which can be toxic to dogs.

The amount of chocolate that causes symptoms varies by the dog’s size, body weight and health.

The amount of chocolate that causes symptoms varies by the dog’s size, body weight and health.

  • The smaller a dog is, relative to its breed, the more chocolate it can ingest before showing signs of toxicity. Small dogs weighing 1 pound (0.45 kg) can consume about 100 grams of milk chocolate without exhibiting symptoms; large dogs weighing 100 pounds (45 kg) may only be able to tolerate 10 grams or less before showing signs of toxicity.
  • Puppies are also more susceptible than mature dogs because their bodies don’t have all their defenses up yet against toxins like caffeine and theobromine found in chocolate products such as cocoa powder or dark chocolate bars (the darker varieties contain higher levels).
  • Older pets take longer to metabolize certain substances in your pet’s body — including some drugs — so if you’re not sure how much your pet has consumed, it’s wise to err on the side of caution with older animals as well!

Symptoms range from mild to severe, depending on the amount of chocolate a dog eats.

What’s the difference between a small amount and a large amount? It all comes down to how much you eat. But it’s not just about the amount of chocolate your dog ate, but also what type of chocolate he ate. For instance, dark chocolate contains more caffeine than milk chocolate; and sugar content can vary widely among different kinds of candies (even if they’re made from similar ingredients). Some people add butter or other ingredients that contain even higher amounts of fat content than what’s already in the cocoa butter. And then there are those who like to put their favorite pet on a diet by giving him nothing but low-fat dark chocolate squares every day for breakfast!

Signs of chocolate poisoning include vomiting, diarrhea, agitation or hyperactivity, seizures and coma.

The signs of chocolate poisoning include vomiting, diarrhea, agitation or hyperactivity, seizures and coma. Vomiting is the most common symptom of chocolate poisoning in dogs. While vomiting can be caused by many things, it’s a good sign that your dog may have eaten something they shouldn’t have if he starts retching or gagging soon after eating food on his own. If you notice that he is eating grass or other plants, this could also be a sign of an upset tummy related to eating chocolate.

If your dog has eaten chocolate-based treats without any other food source in the past 24 hours (such as the candy bar you left out), watch him closely for symptoms such as diarrhea or hyperactivity that could indicate toxic levels of caffeine and blood sugar spikes are causing problems with digestion and metabolism in his body chemistry.

It is best not to feed chocolate to dogs at all.

It’s best not to feed your dog any chocolate at all. Chocolate is toxic to dogs and other animals as well, but dogs are much more sensitive than humans and cats are. The sugar in chocolate can cause a dog’s blood sugar level to rise quickly so they get hyper or they can develop low blood sugar and get weak, tired or even fall into a coma. They may also experience vomiting or diarrhea because of the caffeine in the chocolate which causes muscle contractions in their stomachs.


In short, chocolate can be toxic to dogs. It’s not a good idea to let your dog eat it, even if you think they might like it. If they do happen to get into some chocolate, you’ll need to know what kind of chocolate was eaten and how much of it so that you can determine whether or not there could be serious health consequences for your pup.