Dietary indiscretion food allergies or lack of digestive enzymes can affect your cats digestive health efficient digestion is essential for your cat to be able to build and repair tissues and obtain energy and for these reasons it is important to feed a food that is formulated to help support digestive health hills id is particularly well accepted by cats with digestive problems gastro intestinal illness can cause vomiting regurgitating flatulence weakness diarrhoea constipation wet cat