Purina pro plan housecat optirenal rich in chicken is a complete dry food for cats who spend most of their time indoors pro plan house cat cat food reduces the accumulation of hairballs unpleasant litter box smells will also be reduced up to 20 as will tartar build up on your cats teeth up to 40 full grown cats have particular dietary requirements pro plan adult is specially developed to cater to these needs with a high quality food providing all the nutrients and energy your cat