After sterilization, the cat's dietary needs change. A food specially formulated for sterilized or castrated cats will counterbalance the possible consequences of sterilization or castration, such as weight gain and the greater risk of urinary disorders.PURINA® CAT CHOW® Adult Sterilized cat food have been specially formulated for sterilized or neutered cats to help counteract the impact of hormonal changes associated with sterilization or castration. Its adapted protein and fat content helps the cat to maintain its healthy weight and strong muscles.PURINA® CAT CHOW® Adult Sterilized is rich in chicken and contains all the essential nutrients for the good health of your cat, including vitamin E to support its natural defenses and group B vitamins to help its body use nutrients efficiently. It also contains natural prebiotics proven to support healthy digestion.