For the nutritional support of pets recovering from serious illness, accident and surgery. Cats and dogs can undergo significant metabolic changes when recovering from a serious illness, injury or surgery. During these stressful conditions the body is challenged to maintain strong natural defenses and spare lean body mass, which makes it is even more important to feed the right food. Cats and dogs need extra energy and nutrients, in an appetizing form, to encourage the recovery process. At Hills, nutritionists and veterinarians developed clinical nutrition especially formulated to help dogs and cats in recovering process. * 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 This food requires a veterinary prescription. Hill's is updating their Prescription Diet® packaging and a portion of the name. With Prescription Diet® a/d®, the current descriptor is "Critical Care"; in 2015 it will be "Urgent Care".