Happy Cat VET Diet - Intestinal Happy Cat VET Diet Intestinal is used to regulate acute and chronic gastrointestinal disorders. The main features of this diet are the particularly highly-digestible ingredients and a moderate carbohydrate content. This effectively reduces stress on the digestive system. Valuable dietary fibre promotes the growth of an optimum intestinal flora balance and holds water to stabilise the consistency of the stools. The chamomile and coriander ingredients contained in the Natural Life Concept® are traditionally used to supplement conventional treatments for gastrointestinal problems.