ROYAL CANIN Calm is a balanced cat food whose special formula can help cats stay relaxed in emotionally stressful situations. This product contains hydrolysed milk protein and L-tryptophan to aid easier handling of cats prone to emotionally induced behavioral changes. The formula can help prevent the formation of hairballs, it can help to excrete swallowed hair with the cat's feces. To support optimal skin health, ROYAL CANIN Calm has been formulated to support the natural skin barrier. This dry food can help create a urinary environment that is unfavorable for the formation of struvite and calcium oxalate crystals. As part of the Royal Canin® Veterinary product line, this product should be fed according to veterinary recommendations. The change of food should always be done slowly and gradually over a period of 7 to 10 days. Make sure to measure the amount of food correctly, especially when mixing wet and dry food. Please consult your veterinarian to determine the best diet for your pet.