You may be surprised to learn that there are foods that are perfectly fine for people but very poisonous to dogs. A list of poisonous foods you should never feed your dog include the following:

Chocolate contains theobromine, which is poisonous to dogs. Grapes and raisins contain a substance that can cause kidney failure. Alcohol, even in minute quantities, can cause alcohol poisoning. Onions are dangerous because they can lead to anemia in dogs.