Senior dog food diets are pet foods that are catered toward the senior or mature pet population. The senior dog population consists of dogs that are over the age of seven for most dog breeds, though in general large and giant breed dogs tend to reach this life stage earlier when compared to smaller breed dogs. Senior dog foods contain nutrients and characteristics that are used to improve the health of the aging dog. Aging in dogs causes many changes to occur physiologically that will require a change in nutrient composition of their diet. A major change that occurs is the decrease in energy requirements which is addressed by lowered caloric content of senior pet foods. Although energy requirements decrease, protein requirements increase as the dog ages. Senior dog foods include a higher p