Hill's Prescription Diet a/d K9/Fel Critical Care 24 x 5.5 oz cans Highly digestible ingredients and extra calories to help during recovery Highly digestible proteins to help wound and tissue healing, preserving lean body mass and promoting a healthy immune system Increased level of potassium to help avoid depletion Highly palatability with a soft consistency aids acceptance by inappetant pets and gives flexibility in feeding -- by bowl, spoon, syringe or feeding tube