Cats can be considered senior from around 7 years of age, which is when their metabolism usually starts to change and you may notice your cat is becoming less active. Like adult cat food, senior diets are typically high in protein. But, as common health issues like kidney disease may start to emerge, senior cat food can also be low in phosphorous, with senior wet cat food being a great option to increase water intake. Consult your vet to find the best senior cat food – some of our top-selling options include IAMS senior cat food, Feline Choice mature, James Wellbeloved senior cat food and Royal Canin senior cat food.