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Hill's Science Diet Science Diet
Hill's Ideal Balance Ideal Balance
Hill's Prescription Diet Prescription Diet
Hill's Healthy Advantage

Kitten Kitten
Adult 1+ Adult 1+
Mature <br/>Adult 7+
Adult 7+
Senior 11+ Senior 11+

Puppy Puppy
Adult 1+ Adult 1+
Mature <br/>Adult 7+
Adult 7+
Senior 11+
Senior 11+

Grain Free


By Health Conditon

z/d® Feline - Dry

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Hill's® Prescription Diet®
z/d® Feline

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Skin/Food Sensitivities

Food sensitivity and intolerance are potentially serious problems that can result in sensitive or irritated skin, coat and ear conditions or even gastrointestinal upset. Cats that have a food sensitivity or intolerance, also called adverse reactions to food, typically experience an abnormal response to the protein in the food. If your cat suffers from adverse reactions to food, it is even more important to feed the right food.

Hill's nutritionists & veterinarians developed Prescription Diet® z/d® clinical nutrition especially formulated to support your cat's skin and food sensitivities. In fact, z/d is clinically proven nutrition to help avoid adverse reactions to food.

Where To Buy

Key Benefits

How It Helps

  • Helps improve digestion & stool quality
  • Helps eliminate food related causes of skin irritation
  • Helps maintain a healthy skin barrier

How It Works

  • Highly hydrolyzed protein
  • Single carbohydrate source: Rice
  • Essential fatty acid enriched
  • Clinically proven antioxidants

Additional Info

Hill's® Prescription Diet® z/d® Feline provides all the nutrition your cat needs. Please consult your veterinarian for further information on how our Prescription Diet® foods can help your cat to continue to enjoy a happy and active life.

Feeding Guide

Daily Feeding Guide:

Adjust feeding amounts as necessary to maintain optimal weight. If you are unsure, ask your veterinarian.
For best results & safety practices:

  • Gradually transition to your pet's new food over a 7 day period.
  • Exclusively feed the recommended Prescription Diet dry food, wet food & treats.
  • Keep fresh water available at all times.
  • Have your veterinarian monitor your pet's condition.
  • To prevent suffocation, keep the packaging out of the reach of pets and children.

Adult maintenance

Weight of CatAmount per Day
6 lb (2,7 kg) 1/2 cup (55 g)
8 lb (3,6 kg) 5/8 cup (65 g)
10 lb (4,5 kg) 2/3 cup (70 g)
12 lb (5,4 kg) 3/4 cup (80 g)
14 lb (6,4 kg) 7/8 cup (90 g)
16 lb (7,3 kg)1 cup (105 g)
18 lb (8,2 kg)1 cup (105 g)
Use only as directed by your veterinarian.
Animal feeding tests using AAFCO procedures substantiate that Prescription Diet® z/d® Feline provides complete and balanced nutrition for maintenance of adult cats.

Average Nutrient and Caloric Contents

Dry 3797 kcal/kg (398 kcal/cup)

Dry Matter1
Carbohydrate (NFE)41.7
Crude Fiber2.6
Vitamin C142 mg/kg
Vitamin E722 IU/kg
Omega-3 Fatty Acids Total0.52
Omega-6 Fatty Acids Total4.85


1The nutrient in the product after moisture is removed. It is used to make direct comparisons of nutrient profiles of products with differing moisture contents.
†An eight fluid oz. measuring cup of z/d® Feline contains 3.7 oz. by weight.


Brewers Rice, Hydrolyzed Chicken Liver, Soybean Oil, Powdered Cellulose, Chicken Liver Flavor, Lactic Acid, Calcium Carbonate, Calcium Sulfate, Glyceryl Monostearate, Potassium Chloride, DL-Methionine, Choline Chloride, vitamins (Vitamin E Supplement, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Niacin Supplement, Thiamine Mononitrate, Vitamin A Supplement, Calcium Pantothenate, Riboflavin Supplement, Biotin, Vitamin B12 Supplement, Pyridoxine Hydrochloride, Folic Acid, Vitamin D3 Supplement), Taurine, Iodized Salt, Dicalcium Phosphate, minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), Mixed Tocopherols for freshness, Natural Flavors, Beta-Carotene

z/d® Feline - Dry zd 052742790510,052742872803,052742872810,052742790503 7905,8728

Rated 4 out of 5 by from Thank goodness for z/d! When I got my rescue cat, I found out she had severe skin allergies and vomiting issues. She would scratch so bad that her body would have open sores. I felt so bad for her as she had to wear a collar for 6 months until we could find a food she could tolerate. At the recommendation of our vet, we tried the z/d. After a couple of months of being only on the z/d, she was finally back to being a "normal" cat. I was so happy to remove the collar after what seemed forever and it was so wonderful to see her turn into a content and happy cat! With her sensitivities, she will remain on z/d for life.
Date published: 2013-07-04
Rated 5 out of 5 by from Used for cat with IBS My vet recommended this food for a 9 year old cat with vomiting issues. She said she thought he may have allergies to the food he was eating. He didn't just vomit, he wretched forcefully. On one occasion he threw up into 9 distinct piles before he stopped. He would also wretch in the morning when there was nothing to come up. We switched him to z/d dry exclusively. He loves it. Tomorrow will be 4 weeks since we switched and he has not vomited once. He also used to have constipation. Changing to this food and adding water to it when I feed him has also solved that problem. One happy cat and owner!
Date published: 2014-02-04
Rated 5 out of 5 by from Great tasting product! One of my cats needs the z/d prescription diet - but the other cats in the house enjoy eating the same food, which makes mealtime a lot easier for me. They get both the z/d dry kibble and z.d wet food in the mornings and dry kibble and treats appropriate for the z/d diet in the evening. They enjoy all 3 products. I sometimes soak the dry kibble in hot water and feed it after it softens - they love both the soaked kibble and the "gravy" it makes. The z/d prescription diet has literally been a lifesaver and the fact that my cats enjoy the taste keeps me from feeling I'm depriving them in any way.
Date published: 2014-03-27
Rated 5 out of 5 by from Excellent buy! My kitten has been struggling with stomach/indigestion issues since I got her from the humane society. I tried all types of canned/dry food and finally got recommended this product through my vet. It is very expensive, but my cat loves it and hasn't had a single problem with diarrhea since! It's worth it. And my new cat (adult) likes it too!
Date published: 2012-11-27
Rated 5 out of 5 by from Just What The Doctor Ordered Recently my cat Cleo became very sensitive to everything she ate, even the non-prescription sensitive system foods, as a result of a newly developed medical condition. She vomited multiple times a day and was losing weight fast. My vet and I reviewed several options and decided to go with Prescription Diet z/d. I am so glad we did. It has been a godsend. No more vomiting from day 2 (the other food had to clear her system)! She tolerates it well and ate it right away without the usual "change is bad" feline reaction. She is a much happier kitty, making me a happier pet parent. She doesn't need much a day because of the nutrient levels (make sure you feed only as much as the instructions tell you!), so a bag lasts a long time. This makes the food much more affordable than I had feared. On the Cleo scale, z/d gets 2 paws way up!
Date published: 2013-08-15
Rated 5 out of 5 by from So thankful for this product! My cat Winston developed a food allergy several years after I adopted him. Before that was diagnosed, he was violently ill almost daily. I tried food for sensitive stomach but that wasn't the answer. It got so bad our vet told me to feed him baby food in order for him to get some kind of nutrition that he could tolerate. We tried several low allergen foods but he wouldn't eat them and several medications that just wouldn't help. My heart was broken for this sweet cat that just couldn't get better. I actually considered having him put to sleep because his quality of life was so poor and I couldn't bear his suffering. Thankfully the vet had us try the Hill's Rx ZD. I can't say how thankful I am for this food. He has now been on this diet for almost 5 years (he'll be 13 this year!). He is an absolute joy. He's so active and funny and loving. He appreciates his good health as much as I do!
Date published: 2014-01-19
Rated 5 out of 5 by from Life Saver We have a two year-old kitten that, as it turns out, has a food allergy. At first we didn't know why she bit her fur and licked it raw. At one point her head was bald. The Dr. recommended ZD before we go to any other extremes. What a safe saver for our kitty. By the time we got her on the diet, she was not only bald, but was hairless with little rash-like bumps over her entire belly and very thin hair on the insides of her legs. After about 6 months on this diet hair covers her entire body (although still thin on the tummy and legs). But what makes this product extra special is that she actually enjoys the taste and consistency. She's put on weight, her fur where she has it is beautiful, and her licking and biting has been all but eliminated. Thanks so much for making such a good product.
Date published: 2013-12-04
Rated 1 out of 5 by from Dry Z/d not appreciated by my cat My cat with tummy issues rarely touches the dry Z/d food. He enjoys the canned version and would probably eat more than a can a day if I could afford it. However, the dry food is rarely touched. I replace it frequently and notice that some is consumed on occasion, but certainly not daily. Is there something that can be done to jazz up the taste and still uphold the health aspect of the product? Thanks. Peg
Date published: 2014-08-31
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