Foods that are toxic for dogs include chocolate, grapes, raisins, fatty foods and foods with caffeine that can increase a dog’s heart rate. Find out why garlic powder and onion powder should not be used to flavor a dog’s food with help from a veterinarian in this free video on dog food and health. Expert: James Talbott Bio: Dr. James R. Talbott is a staff veterinarian at Belle Forest Animal Hospital and Kennel in Nashville, Tenn. Filmmaker: Dimitri LaBarge