The Royal Canin Gastrointestinal Hairball Diet is a complete and balanced feed for adult cats over 1 year old that are prone to hairball formulation or sensitive skin. It contains Royal Canin's Hairball Complex which is enriched with psyllium that enables your cat to eliminate a build up of hairballs in a natural way. It also contains a specially selected choice of nutrients which help to maintain the natural barrier of the cat's skin. Digestive supportA highly digestible formula with balanced fibres, including prebiotics, to support a healthy digestion and transit. Hairball complexA specific blend of fibres (including psyllium) helps eliminate ingested hair and control hairball formation. Moderate calorieModerate calorie content to help maintain ideal weight.