Royal Canin Indoor Adult Cat 27 cat food is made special for indoor adult cats from 1-10 years of age. Cats living exclusively indoors have a more sedentary lifestyle, lower energy requirements and a higher risk of obesity. The lifestyle of the indoor cat, sheltered from temperature variations and changes in day length, disrupts the natural seasonal cycle of fur growth, so that it sheds almost continuously, aggravating the problem of hair swallowed during grooming. Improved digestibility of the food in your cat's gastrointestinal tract may contribute to smaller and less foul smelling feces. Specific nutrients can help to trap calcium in the mouth, not allowing it to attach to the teeth and contribute to the formation of tartar. A combination of different types of fibers encourages intestinal transit and helps to facilitate the elimination of the hair your cat swallows every day.