A senior cat diet is generally considered to be a diet for cats that are mature (7–10 years old), senior (11–15 years old), or geriatric (over 15 years old).[1] Nutritional considerations arise when choosing an appropriate diet for a healthy senior cat.[2] Dietary management of many conditions becomes more important in senior cats because changes in their physiology and metabolism may alter how their system responds to medications and treatments.[3][4]