ROYAL CANIN® diets utilise very highly digestible ingredients, including importantly, highly digestible proteins, alongside prebiotics to ensure good digestive health. As such, your cat or dog will utilize the majority of the nutrients in the food meaning they are much more likely to produce smaller, firmer and less smelly faeces. It would be very uncommon and unlikely for ROYAL CANIN® diet's to digestive issues, however it is important that when transitioning on to any new ROYAL CANIN® diet, that a 7 day transition is followed to help avoid any gastrointestinal upset. If your pet has ongoing digestive upset, then be sure to follow up with your Veterinarian to rule out a number of potential causes. As part of this, your Veterinarian may recommend a ROYAL CANIN® veterinary therapeutic diet designed for Gastro Intestinal disorders, or perhaps even a unique hydrolyzed diet if a food allergy is suspected.