You can also cook for your dog. Dogs favor rice, vegetables, and chicken. Have your veterinarian clean your dog's teeth once a year and brush their teeth with a medium-bristle toothbrush and doggie toothpaste. Do not use human toothpaste. Tartar is a breeding ground for bacteria.
Bacteria get in the blood stream and affect the liver and kidneys.
Give your dog plenty of exercise. Dogs like to walk around the neighborhood. As a dog ages, the muscle strength decreases and body fat increases. Research supplements for additional nutritional needs. Vitamin supplements, like A, C, and E can strengthen your dogs immune system.