 Did you know your dog's food could be harmful? Dr. Marty says there's a one major red flag. Cook dog food, like kibble or canned food. When dog food is cooked at high temperatures, the amino acids often overheat and can create dangerous compounds called advanced glycation end products. AGEs can cause dangerous buildup in your dog's system, make them act slower or older. High amounts could be connected to cancer. Even healthy and organic dog food is often cooked at high temperatures, hard to avoid.