Thank you for visiting

To log out and end your session, click "OK"


Refine Your Search

Cat
Dog

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

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

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

Grain Free
Indoor
None

Dry
Wet
Treats

By Health Condition

  • Prescription Diet z/d Canine ULTRA Allergen-Free - Dry Dog Food
z/d® Canine ULTRA - Dry

Click here
for more images

Hill's® Prescription Diet®
z/d® Canine ULTRA


Adverse reaction to food.

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

At Hill's, nutritionists and veterinarians have developed clinical nutrition especially formulated to help manage your dog's dietary sensitivity and help reduce the possibility of adverse reactions to food.

Buy NowBuy now Buy Now

Share this product

Key Benefits

Prescription Diet® z/d® Canine ULTRA is formulated with the following benefits:
  • Formulated with Hill's Hydrolyzed Protein System, highly digestible proteins that minimize the chances of adverse reactions to food
  • No intact animal protein to help avoid adverse reactions to food
  • Highly digestible carbohydrates and fats to help reduce gastrointestinal workload
  • Increased in omega 3 and 6 Fatty Acids to help nourish the skin and coat
  • Added antioxidants to support a healthy immune system

Additional Info

Hill's Prescription Diet® z/d® Canine ULTRA is a complete and balanced food that provides all the nutrition dogs need. Please consult your veterinarian for further information on how our Prescription Diet® foods can help your dog to continue to enjoy a happy and active life.

Prescription Diet foods are made in our own U.S. facilities with ingredients from North America, Europe, Australia and New Zealand, which exceed industry standards for purity and nutrient content.


100% Guaranteed Great Taste. We're confident your pet will enjoy Hill's Prescription Diet foods. In fact, we're so confident that we offer a money-back guarantee. Hill's guarantees Prescription Diet pet foods for quality, consistency and taste, If you are not completely satisfied with your purchase for these reasons, return the unused portion to your veterinarian for a full refund or replacement.

Feeding Guide

Daily Feeding Guide:

Important Feeding Information

  • These amounts are a starting point only. Your dog may need less or more food to maintain proper weight. Adjust as needed. If you are unsure, ask your veterinarian.
  • With your veterinarian's approval, mix increasing amounts of your dog's new food with decreasing amounts of the old food over a 7-day period.
  • Prescription Diet® formulas are available in a wide variety of dry foods and treats for your dog's unique needs, and canned foods with delicious flavors your dog will love. Supplementation with other foods or treats is unnecessary and may decrease the effectiveness of the food. When using with canned food and treats, decrease the amount of dry food to avoid overfeeding.
  • Keep fresh water available at all times!
  • For best results, have your veterinarian monitor your dog's condition.
  • To prevent suffocation, keep this package out of the reach of pets and children.

Feeding transition

Adult maintenance

Weight of DogAmount per Day
5 lb (2,3 kg) 1/2 cup (45 g) - 3/4 cup (65 g)
10 lb (4,5 kg) 7/8 cup (75 g) - 1 1/4 cups (110 g)
15 lb (6,8 kg)1 1/4 cups (110 g) - 1 3/4 cups (155 g)
20 lb (9,1 kg)1 1/2 cups (130 g) - 2 1/4 cups (200 g)
30 lb (14 kg)2 cups (175 g) - 3 cups (265 g)
40 lb (18 kg)2 2/3 cups (235 g) - 3 2/3 cups (325 g)
50 lb (23 kg)3 cups (265 g) - 4 1/4 cups (375 g)
60 lb (27 kg)3 1/2 cups (310 g) - 5 cups (440 g)
70 lb (32 kg)4 cups (350 g) - 5 1/2 cups (485 g)
80 lb (36 kg)4 1/3 cups (380 g) - 6 cups (530 g)
100 lb (45 kg)5 1/4 cups (460 g) - 7 1/4 cups (640 g)
Use only as directed by your veterinarian.
Animal feeding tests using AAFCO procedures substantiate that Prescription Diet® z/d® Canine ULTRA provides complete and balanced nutrition for maintenance of adult dogs.

Average Nutrient and Caloric Content

Dry 3724 kcal/kg (327 kcal/cup)

Nutrient
 
Dry Matter1
%
Protein19.6
Fat13.3
Carbohydrate (NFE)59.5
Crude Fiber2.9
Calcium0.66
Phosphorus0.5
Sodium0.29
Potassium0.67
Magnesium0.055
Vitamin C111 mg/kg
Vitamin E611 IU/kg
Omega-3 Fatty Acids Total0.53
Omega-6 Fatty Acids Total4.40

References

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® Canine ULTRA contains 3.1 oz. by weight.

Ingredients

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


z/d® Canine ULTRA - Dry zd 052742790107,052742843902,052742867601

Hill's® Prescription Diet® z/d® Canine ULTRA 4.6 5 201 201
This food has been great for my dog! My dog loves this food and we also feed him the can Z/D Ultra. When he was a puppy and had so many allergeries and finally found a Vet that put him on this food and it worked for my baby so great! Anything else would just break him out so bad and he was constanstly taking shots for alleregies. Thank you from my little Jake. October 21, 2013
A diet that works! My dog's food allergy symptoms decreased 100% after being switched to this diet. After testing we knew we were dealing with food allergies as well as environmental allergies. This was the easy choice. he loves the food and i do not need to worry he is getting something he will react to. October 19, 2013
This food saved my dogs life! My min pin, Bently, has severe allergies. I tried EVERY prescription diet on the market and only found one that my dog can eat without getting hot spots and itching. That food is hills z/d! He went from looking horrible , thin hair, sores and itching to having a beautiful coat almost overnight. The transformation was amazing! He loves the food also which is a blessing! I am sure I would have had to put my dog down because he was miserable! I am just so thankful hills makes a food for my baby, that he does not react to! Thanks science diet! KIM n BENTLY September 28, 2013
This product helps with skin allergies. I really like this product. My pug suffers from severe skin allergies and this food helps. September 17, 2014
Meh Not surprisingly, our female Lab mix has a very sensitive stomach; z/d Ultra is the only thing we've found that she can consistently eat without getting sick (and even then it's hardly foolproof, as anything from a Cheez-It to a leaf in the yard can cause problems for days). We didn't know she had this issue when we got her, and I won't give her up just because she has a bad stomach, but it's not much fun and z/d is the only option we know of that offers any relief. That said, if we could find a less-expensive brand for her, we'd switch in a heartbeat. Honestly I find the price on this stuff ridiculous. I know that you have to pay for quality and I appreciate that it's available, but spending over $1,000 a year on dog food is beyond anything we ever expected. Incidentally, having to spend that much on food has reduced the amount that we've been able to budget towards other veterinary care, which sucks but is our reality. I thought that signing up for the website and printing out coupons would help, but it turns out that's only a one-time offer and is basically useless. Anyway- I would only recommend this as a last-ditch option for someone in our situation, but the cost would keep me from recommending it for any other reason. I have no problem with companies making a profit, but I get a pit in my stomach every month when I have to go pick up another bag, and I hope at some point Hills will either drop the price tag a bit or someone else will come out with an option that's viable for our dog. September 17, 2014
Science Diet z/d Works for Dogs with Allergies My vet recommended Science Diet z/d over a year ago for my adopted dog who has multiple food allergies and skin conditions. It is the only food he can eat without any adverse reaction. I wish the price was less, but this product does seem to reduce the number of vet visits. September 16, 2014
Great product I would like to buy a larger bag than 25lbs but I can not find one on the site. September 16, 2014
The best dog food ever! My bichon developed a food allergy at about 8 years old. I had fed her a high quality lamb and rice food since she was a puppy and suddenly, she began vomiting it up. I tried a variety of other foods which also caused vomiting. Her veteranarian finally suggested the dry Hills Z/D Ultra - not only did the vomiting stop immediately, she absolutely loves this food to this day! This food does cause looser stools, so I add a tablespoonful of pure pumpkin purée to each bowlful, which helps firm the stools. I am very thankful for this dog food and my 12-year old Pearly May is too! September 16, 2014