The gastrointestinal tract includes the esophagus, stomach, small intestine, large intestine, and colon. Therefore, gastrointestinal disease is defined as any abnormality involving one or more of these structures. By feeding your pet a diet that contains precise amounts of key nutrients, you can not only help minimize vomiting, diarrhea,or constipation, you can also help to support and improve the function of the gastrointestinal structures. This gastrointestinal diet is formulated to help maintain the balance of gastrointestinal microflora and intestinal mucosal integrity.Royal Canin