Cats which have not been neutered only eat as much food as is needed to provide them with energy. After neutering the hormonal changes affect the metabolism & you may notice that your cat doesn´t recognise when it is full up. This can quickly cause weight gain. Neutered kittens do not need as much energy. Royal Canin Kitten Sterilised has a low fat content & can help your kitten to maintain a healthy body weight. A balanced selection of nutrients & minerals (proteins calcium & phosphorus) will make sure that your cat stays healthy & lively.