Royal Canin Feline Health Nutrition Sterilised 37 Adult Cat Dry Food 400gSterilised 37 Dry, Cat Balanced and complete feed for cats Specially for neutered cats (from 1 to 7 years old) PRODUCT DETAILS After your cat has been neutered, a change of diet may be required to ensure that the nutrients it consumes supports its somewhat altered energy needs. ROYAL CANIN Sterilised 37 contains a moderate level of fat when served in adequate daily rations this helps your cat to maintain an ideal bodyweight after it's been sterilised.