Royal Canin Hairball Care is a great choice for kitties prone to hairballs as it contains a specially formulated Hairball Hair complex composed of a specific blend of natural dietary fibers (including psyllium) to double the amount of hair that naturally passes through the digestive tract, helping to reduce hairball formation. A study by Royal Canin showed that this dry food reduced hairball formation in 14 days. This diet is also formulated to be gentle on digestion and contains balanced minerals to support urinary health.