Is your cat sensitive to his food? BLUE Natural Veterinary Diet HF Hydrolyzed for Food Intolerance dry cat food, is a natural cat food enhanced with vitamins, minerals and other nutrients, including omega 3 & 6 fatty acids to support healthy skin and coat. Formulated for cats who experience food intolerance, this sensitive stomach cat food helps minimize adverse food reactions to common proteins because it starts with delicious, hydrolyzed salmon, a highly digestible protein.