Royal canin veterinary diet canine intestinal the two most common signs associated with disturbances of the gastrointestinal are vomiting and diarrhoea royal canin intestinal diet is recommended for nutrition support of the following conditions diarrhoea inflammatory bowel disease ibd convalescence maldlgestion malaborption exocrine pancreatic insufficiency epi colitis bacterial overgrowth it is not recommended in cases of hepatic encephalophathy lymphangiectasia