For anyone who loves dogs, it’s fairly common knowledge that chocolate is very toxic to your furry friend. However, if this is news to you, chocolate contains theobromine and caffeine, ingredients known to increase the heart rate and stimulate the nervous system. In dogs, ingesting these ingredients may result in vomiting, diarrhea, restlessness, increased urination, tremors, elevated heart rate, seizures, and death.

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Here are some other foods that you might not have known are toxic to your dog:

Apple Seeds

Though it’s safe to give your dogs apples, be sure to slice, core, and seed them before you feed them to your dog. The casing around apple seeds are toxic to dogs because they contain a chemical called amygdalin that releases cyanide when digested. They become a serious issue when a lot are consumed and the dog chews them up, allowing it to enter the bloodstream.


This fruit contains persin, a fungicidal toxin than can cause diarrhea, vomiting, and heart congestion. The pit itself is a choking hazard, but it is also full of this toxin. If your dog ate a small piece of avocado they might be okay, but monitor their behavior and call your vet for further care.

Coffee, Tea, and Other Caffeine

Caffeine is highly toxic to dogs and within 1-2 hours of ingesting it they could experience mild to severe hyperactivity, restlessness, vomiting, elevated heart rate and blood pressure, tremors, seizures, and death.


Though healthy in small amounts, especially for flea treatment, large quantities of garlic can be risky. Garlic is similar to onions, another toxic food for dogs, and will decrease a dog’s blood cell count, causing anemia. Symptoms of this include weakness, vomiting, and trouble breathing.


Grapes and raisins will cause kidney failure in dogs. Even in small amounts it can make a dog very ill. An early symptom is vomiting, followed by low energy and depression. Dogs can die from just a small handful.

Macadamia Nuts

These nuts will cause muscle shakes, vomiting, increased temperature, and weak back legs in your dog. It can be lethal even if ingested in small amounts.

Milk and Dairy

In small amounts, dairy products are going to give your dog smelly gas and diarrhea. They can also cause digestive problems and trigger food allergies.

Sugar and Xylitol

Sugar and the sugar alcohol xylitol, found in many human foods and candies, are toxic for your dog. Sugar will cause obesity, dental problems, and even diabetes in your dog. Xylitol is extremely toxic because it can cause low blood sugar, seizures, liver failure, and death.

This is not an exhaustive list of everything that could be unhealthy or toxic for your dog. If you’re unsure if something is safe or not for your dog, look it up. As a rule of thumb, it’s safest just to give them food and treats that are made specifically for dogs. They provide the nutrients they need to live happy, healthy lives.

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