prescription diet a/d canine/feline urgent care w/chicken, 24 x 5.5 oz cans hills prescription diet food prescription diet a/d canine/feline urgent care w/chicken is specially made food for dogs or cats recovering from surgery, illness or injury. while under these stressful conditions, your pet is challenged to maintain their strong natural defenses which make it even more important to feed the right food to help your pet bounce back from these tough situations. available in 24 x 5.5 oz cans.