Cats often require slightly fewer calories after neutering or sterilization, as their metabolism slows down. Simply reducing the amount of their usual food can result in the cat not getting enough nutrients. A low-calorie food with plenty of lean meat, vegetables, and fruit provides your cat with all the nutrients it needs. In addition, many cats find it difficult to switch to new food and become picky eaters. High-quality ingredients, lots of delicious sauce, and tender meat stimulate the appetite.