For adult cats (1-7 years old) prone to hairballs. Hairball Care's exclusive anti-hairball complex helps your cat eliminate twice as much hair by natural digestion. Cats spend 30% of their time grooming, with up to two thirds of hair they shed being swallowed during grooming sessions. This can lead to hairballs in the digestive tract. With exclusive use, Hairball Care helps your cat eliminate twice as much hair by natural digestion. Hairball Care is formulated with an exclusive blend of fibres including psyllium (rich in mucilage) and insoluble fibres. This means hair swallowed can be eliminated naturally instead of collecting in the stomach and being regurgitated. * Royal Canin internal study, 2013 - Compared to a control feed for adult cats not containing the Hairball Care exclusive complex. Formulated with a balance of minerals to help maintain the health of an adult cat's urinary tract. Please note: Estimated cost per day and how long this product will last you is based on averages of age, size, breed and this being the ONLY source of food.