 Did you know your dog's food could be harmful to him or her? Dr. Marty says there is one major red flag here. Cooked dog food, like kibble or canned food. When dog food is cooked, he says, at high temperatures, the amino acids overheat and can create dangerous compounds called advanced glycogen and products. The AGEs can cause dangerous buildup in your dog's system, make them act weird, slower, or even older.