may vary in composition; generally, they are formulated to provide lower energy intake and increased digestibility. gluten-free diet one without wheat, rye, barley, buckwheat, or oats or related products. high-calorie diet, high-energy diet one that furnishes more calories than needed for maintenance; used to increase body condition, in recovery from illness and for maintenance under stressful conditions. high-fiber diet one relatively high in dietary fiber; in dogs and cats, used in the management of large and small bowel diarrhea, diabetes mellitus, constipation and obesity. high-protein diet one containing large amounts of protein; used in the management of dogs and cats recovering from illness. home-prepared diet one prepared in the home kitchen, in contrast with commercially prepared pet foods. hypoallergenic diet one formulated to avoid suspected allergens; usually used in the management of allergic skin or bowel disease. liquid diet a diet limited to liquids or to foods that can be changed to a liquid state. low-calorie diet one containing fewer calories than needed to maintain weight; normally used in management of obesity in dogs and cats. low-fat diet one containing limited amounts of fat; used in the management of pancreatic disease, bowel disease, and obesity in dogs and cats. low-fiber diet see low-residue diet (below). low purine diet in dogs and cats, generally a low-meat diet. low-residue diet one with a minimum of cellulose and fiber and restriction of connective tissue found in certain cuts of meat. It is prescribed for irritations of the intestinal tract, after surgery of the large intestine, in partial intestinal obstruction, or when limited bowel movements are desirable. Called also low-fiber diet. low vitamin A diet one containing low levels of vitamin A; in dog and cat diets, this would mean little or no organ meats. The only probable indication for such a diet is in the treatment of hypervitaminosis A. lower urinary tract disease diet one that promotes acidification of the urine and containing restricted magnesium and phosphorus, and sometimes increased salt. monomeric diet see elemental diet (above). phosphate-restricted diet one containing restricted amounts of phosphorus; used in the management of chronic renal disease.