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Hill's Prescription Diet z/d Hydrolyzed Chicken Flavor Dry Dog Food, 25 lbs.

Hill's Prescription Diet z/d Hydrolyzed Chicken Flavor Dry Dog Food, 25 lbs.


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Veterinary Diet Item
This item requires veterinarian authorization
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This product requires veterinarian authorization. We’ll collect your pet and vet information to authorize this item before shipping.

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Weight
8 LB
$52.22
17.6 LB
$96.87
25 LB
$125.39
Free Shipping $35+
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Description

Please note that the product information displayed is provided by manufacturers, suppliers and other third parties and is not independently verified by Petco.

Food sensitivities and intolerances can cause skin irritation, ear conditions, and digestive upset. Dogs with adverse food reactions, often due to food allergies or intolerances, benefit from a diet specifically designed to support food sensitivities. Hill's nutritionists and veterinarians developed Prescription Diet z/d, a clinical nutrition specially formulated to support dogs with food sensitivities. Clinically proven to help avoid adverse food reactions, z/d provides targeted nutrition for dogs with food allergies or intolerances. Made with Hill's breakthrough ActivBiome+ Digestion, a proprietary blend of prebiotic fibers, which is clinically shown to activate the gut microbiome to support digestive health and promote healthy stool. This nutrition is also clinically shown to firm loose stool in 3 days.

  • - Hill's Prescription Diet z/d Hydrolyzed Dry Dog Food is specially formulated by Hill's nutritionists and veterinarians to manage dogs' food sensitivities
  • - Nutrition clinically proven to help avoid skin and digestive signs of adverse food reactions
  • - Made with highly hydrolyzed proteins that are broken down to avoid detection by the immune system
  • - Rich in Omega-6 & 3 fatty acids to promote skin health and regeneration
  • - Continued feeding reduces risk of adverse food reactions & promotes healthy skin and digestion
  • - Formulated to support visible improvement in skin & coat in 30 days
  • - Clinically shown to firm loose stool in 3 days

Specifications

SKU2191040
LifestageAdult
Primary FlavorChicken
Primary BrandHill's Prescription Diet
Days to ShipShips Within 2-5 Business Days
Weight25 LB

Additional Features

Grain FreeNo
Personalized Item flagYes
Primary FlavorChicken
LifestageAdult

Pet Sizing

Breed SizesMost Sizes

Item Dimensions

Length15.748 IN
Height5.709 IN
Width23.363 IN

Ingredients

Corn Starch, Hydrolyzed Chicken Liver, Hydrolyzed Chicken, Ground Pecan Shells, Powdered Cellulose, Flaxseed, Dried Beet Pulp, Hydrolyzed Chicken Flavor, Soybean Oil, Dried Citrus Pulp, Dicalcium Phosphate, Lactic Acid, Coconut Oil, Fish Oil, Calcium Carbonate, Pressed Cranberries, Glyceryl Monostearate, DL-Methionine, Potassium Chloride, Iodized Salt, vitamins (Vitamin E Supplement, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Niacin Supplement, Thiamine Mononitrate, Calcium Pantothenate, Vitamin A Supplement, Riboflavin Supplement, Biotin, Pyridoxine Hydrochloride, Vitamin B12 Supplement, Folic Acid, Vitamin D3 Supplement), L-Tryptophan, Choline Chloride, minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), Magnesium Oxide, Mixed Tocopherols for freshness, Natural Flavors, Beta-Carotene.

Guaranteed Analysis

Nutrient GA Min, GA Max: Moisture 10.0 %, Protein 15.5 %, Fat 11.0 %, Crude Fiber 8.0 %, Ash 7.6 %, Total Omega-3 FA 0.5 %, Total Omega-6 FA 1.5 %.

100% SATISFACTION GUARANTEED! Hill's is so confident that your pet will enjoy their foods, that they offer a 100% money-back guarantee. If you are unsatisfied for any reason, return the unused portion to the place of purchase for a full refund or replacement.

Please see package for complete feeding instructions. 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 pets new food over a 7 day period. Exclusively feed the recommended Prescription Diet dry food, canned food & treats. Keep fresh water available at all times. Have your veterinarian monitor your pets condition.

Veterinarian authorized products ship only after Petco receives an authorization from your vet. We will not need to reach out to your vet or you if the authorization includes refills. When all available refills are used or the authorization expires, we will reach out to your vet to obtain a new authorization. For new authorizations, we will attempt to reach your vet for a total of 5 days. If your vet does not respond within 5 days, we will then reach out to you for a total of 3 days. If no response is given, the order will then be canceled.

Default": "These amounts are a starting point only and should be adjusted to maintain proper weight.

Deals That Sleigh. Spend $30+ Get An Extra $10 to use in store or online. Shopw Now. Ends 12/25/25. $10 off applies to a future purchase. Terms apply.

Reviews

Rating Snapshot

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5 stars

259

4 stars

58

3 stars

28

2 stars

9

1 stars

68

Overall Rating

4
202 out of 422 (48%) reviewers recommend this product

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Most Helpful Favorable Review

Sadie’s health

Reppucci pet

6 years ago

This is great for dogs with allergies to certain foods. Her itching is less and ...

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11 PEOPLE FOUND THIS HELPFUL

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5

and

4

Most Helpful Critical Review

Works

Jackie2717

7 years ago

Our dog has a food allergy that we can’t narrow down so our vet has recommended ...

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7 PEOPLE FOUND THIS HELPFUL

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3

2

and

1

Customer Images

Filter Reviews

Rating
1 - 8 of 280 Reviews
Most Recent

142 Ratings-Only Reviews

Beware: Changed formula, dog now allergic to it

Scooter

15 days ago
Alas, company changed formula to add their new probiotic or something to it. No warning to customers. This dogfood is expensive and requires a prescription. Some notification would have been warranted. I’m sure Hill’s sends out marketing communications. I’m not sure if they inform customers of formula changes in them. My dog can’t eat pecan shells and cranberries. Perhaps a competitor will offer a better formula.

Originally posted on Hill's Pet Nutrition

Response from Hill's Pet Nutrition:
13 days ago
Consumer Affairs
Thank you for your review. We are disappointed to hear of your experience with the new formulation. To maintain our leadership in nutritional health care for companion animals, we periodically make changes to product formulas to incorporate additional health or product design benefits. As a manufacturer, we notify retailers and veterinary clinics whenever we make changes to our pet food formulas. However, we understand that sometimes not all pet parents are made aware of these changes, and we sincerely apologize for any inconvenience this may cause. Reaching every single person who feeds our products can be challenging, but we are committed to keeping you as informed as possible. Please know, all of our products are 100% satisfaction guaranteed. If you would like to take advantage of this guarantee, please return the unused portion of the product to the place of purchase for a refund or exchange.

Now with Pecan Shells, Beets, and Cranberries?! WHY?!

Owner of Allergic Spaniel

16 days ago
INGREDIENTS CHANGED!! WHY?! Now with Pecan SHELLS, dried BEETS, and pressed CRANBERRIES - This Rx food for Rx and expensive because dogs, like mine, can only handle the hydrolyzed protein due to numerous food allergies. Putting several new food items (and nut SHELLS if you can even call that food...that's CHEAP FILLER!) that may now be triggering his numerous food allergies...so frustrating! My dog has been on this food for years (he's 9 now) after years of failed food trials and allergy testing -- He can NOT have anything with rice, peas, potatoes (sweet or white), corn, wheat, etc. along with a long list meats! Unfortunately, at this price point it doesn't make sense to keep pay this much when filled with literal garbage now. Time to start looking for a different dog food again...

Originally posted on Hill's Pet Nutrition

Response from Hill's Pet Nutrition:
13 days ago
Consumer Affairs
Thank you for your review. We are disappointed to hear of your experience and we encourage you to continue the conversation with your trusted veterinarian. To maintain our leadership in nutritional health care for companion animals, we periodically make changes to product formulas to incorporate additional health or product design benefits. We did update the formulation of the Hill's Prescription Diet z/d products to add the ActivBiome+ Multi-Benefit Bundle. This is an advanced blend of prebiotic fibers and antioxidants to support digestion, bolster the immune system, and support organ health. Our main priority is making a product that our pet parents trust and a meal that pets love. Our products are formulated with natural ingredients and the right nutrients. More than 200 scientists, engineers and veterinarians with more than 50 advanced degrees in various sciences at Hill’s, contribute to the research and development of efficacious products to meet the needs of your pets.

Change in color/formulary of Z/D kibble

ldmichaux

29 days ago
Very frustrated. No notification about the change in formulary. I just opened a new bag and noticed right away the color of the kibble is not the same . It is much lighter. I use the Hills ZD chicken flavor, this now just says "original flavor". I don't have enough of the old dog food to transition. Very disappointed in you not advertising a change. It took forever to find a food that my dog would eat and not make him sick!!!!!!

Originally posted on Hill's Pet Nutrition

Response from Hill's Pet Nutrition:
28 days ago
Consumer Affairs
Thank you for reaching out to us. To maintain our leadership in nutritional health care for companion animals, we perform continuous research on our current products and we periodically update our product formulas to incorporate additional health and design benefits. Our dedication to learning, technology, and the expertise of our talented scientists has driven us to develop industry-leading product innovations. This product has had 5 formula changes since its release. As a manufacturer, we notify retailers and veterinary clinics whenever we make changes to our pet food formulas. However, we understand that sometimes not all pet parents are made aware of these changes, and we sincerely apologize for any inconvenience this may cause. Reaching every single person who feeds our products can be challenging, but we are committed to keeping you as informed as possible.

Great features

Wendy

1 month ago
My dog's stools have firmed up; he has less itching and scratching

Originally posted on Hill's Pet Nutrition

Change of prescription formula

Morgan

1 month ago
Why was the formula of a prescription dog food changed without notifying the consumer. Obviously we need a certain formula or we would not be paying the cost of a prescription only food that the formula was changed without any label change to alert. Poor practices

Originally posted on Hill's Pet Nutrition

Response from Hill's Pet Nutrition:
28 days ago
Consumer Affairs
Thank you for reaching out to us. To maintain our leadership in nutritional health care for companion animals, we perform continuous research on our current products and we periodically update our product formulas to incorporate additional health and design benefits. Our dedication to learning, technology, and the expertise of our talented scientists has driven us to develop industry-leading product innovations. This is the 5th formula update since the products release. As a manufacturer, we notify retailers and veterinary clinics whenever we make changes to our pet food formulas. However, we understand that sometimes not all pet parents are made aware of these changes, and we sincerely apologize for any inconvenience this may cause. Reaching every single person who feeds our products can be challenging, but we are committed to keeping you as informed as possible.

Yuck

Frustrated Customer

1 month ago
I am so incredibly frustratedthat this product was changed with no customer notice. We have been using it for 2 years through Chewy. I just sent a case back because I thought it was bad! My dog won’t eat the new formula. It looks nasty and smells worse. Great job Hills with communicating to your customers.

Originally posted on Hill's Pet Nutrition

Response from Hill's Pet Nutrition:
1 month ago
Hills Pet Nutrition Consumer Affairs
Thank you for your review. For the Prescription Diet z/d Wet and Dry Dog Food, we added the benefit of the ActivBiome+ Digestive Bundle that supports digestion, bolsters the immune system, and supports organ health. As a manufacturer, we notify retailers and veterinary clinics whenever we make changes to our pet food formulas. However, we understand that sometimes not all pet parents are made aware of these changes in a timely manner, and we sincerely apologize for any inconvenience this may cause. Please know that we are disappointed to hear that we didn't get your dogs taste of approval for the formula upgrade and we will be sure to share your comments with our team. Please speak with your veterinarian in the meantime to obtain further recommendations.

The new formula looks like mud

DogMom

1 month ago
We just received an autoship from Chewy. Without being told about the change. So we are not able to transition properly, because we don’t have enough original left. This is very distressing!

Originally posted on Hill's Pet Nutrition

Response from Hill's Pet Nutrition:
1 month ago
Consumer Affairs
Thank you for your review. We are disappointed to hear of your experience. To maintain our leadership in nutritional health care for companion animals, we periodically make changes to product formulas to incorporate additional health or product design benefits. As a manufacturer, we notify retailers and veterinary clinics whenever we make changes to our pet food formulas. However, we understand that sometimes not all pet parents are made aware of these changes, and we sincerely apologize for any inconvenience this may cause. Reaching every single person who feeds our products can be challenging, but we are committed to keeping you as informed as possible.

Revolted Pup

1 month ago
My dog went from loving the Hills Z/D dog food to refusing to eat the new and "improved" ActiveBiome formula; unfortunately, we had to switch foods. As this is a food designed for dogs who have stomach issues it would've been nice to have been alerted to a formula change before receiving a new bag. My dogs internal medicine vet said they have received multiple complaints from other patients not wanting to eat the new formula. Hopefully Hill's is receptive to all the criticism regarding the new formula and reverts those changes.

Originally posted on Hill's Pet Nutrition

Response from Hill's Pet Nutrition:
1 month ago
Consumer Affairs
Thank you for your review. We are disappointed to hear of your experience. To maintain our leadership in nutritional health care for companion animals, we periodically make changes to product formulas to incorporate additional health or product design benefits. Despite the favorable benefits gained through the reformulation, our pets are creatures of habit and may need a little help to get accustomed to the change in the food. As a manufacturer, we notify retailers and veterinary clinics whenever we make changes to our pet food formulas. However, we understand that sometimes not all pet parents are made aware of these changes, and we sincerely apologize for any inconvenience this may cause. Reaching every single person who feeds our products can be challenging, but we are committed to keeping you as informed as possible.
1 - 8 of 280 Reviews

Questions

1 - 9 of 9 Questions
Sort by: Newest Answers

How do I change my prescription dog food order from a 25lb bag to a 17.6lb bag?

  1. You can cancel your current autoship order and place a new order with the smaller bag size. 



Did they change the size of the 25lb bag? With the change of the picture, the bag seems to contain less food. I can fit it in the bin I have where I couldn't before and I also run out quicker. I have repeat delivery and have had to order much sooner. 

  1. It is possible. After our dog being on z/d for two years we had to change her diet as she got pancreatitis. Was it the z/d? Wasn't anything else since that was all she ate.



Has anybody noticed the color of the poop that sacked for a few days if it turns dark brown almost black concerned puppy owner with allergies!!!

  1. No, That has not happened with us and we have 2 dogs age 6 and 8 years old on this dog food.



Did anyone’s dog get worse before getting better? 

  1. My girlie (Ozzie) maintained a status quo, no better and no worse on the z/d. Her allergy symptoms manifest as scratching especially her ears repeated frequent ear infections, She chewed on her front paws.  I answered your question so you can get some idea of how many had decreased symptoms or more/increased symptoms.  She has changed to a different brand of food and is seeing a skin and allergy specialist.  She is showing the first signs of improvement I’ve seen.



Does this food have the S/O+ Shield component?

    Is this dog food grain free?

    1. Sorry! I originally said yes, but I believe I was incorrect.



    I have a 4 months French bulldog and I wanted to know if it’s for puppies too

    1. I'm sorry, I do not know if it is for puppies too. I would ask your vet how they feel about feeding a 4 month old dog the Hills Z/D. My very allergic bubs started eating this brand when he was around a year old. It took a while because I tried different brands and even raw before I tried Hills Z/D. Raw worked well with eliminating his constant itch and red muzzle, but he always had soft stool. Long story short, it seems like my dog is allergic to seafood - and most dog foods have omega-3 from fish oil. In the end, Hills Z/D is amazing for my dog! I believe the soft food version has had recall issues. But the dry dog food hasn't. I hope this is helpful.



    My shelters have been eating this food for years.  However, we just bought a new bag and since we started feeding it to my dogs they have been acting differently.  They leave half of the food in their bowls and don’t seem interested in eating it.  

    1. This happened with my dog, Geo - when I first opened a 25 lb bag! He was hesitant to eat it, and his bowel movements (timing and texture) changed. After a few days (to ensure it was the food), I ordered another bag (17 lb bag so as to not have to throw away a 25 lb bag), and he is back to normal!



    I am doing a food trial using this dog food to rule out food allergies. I noticed there is chicken liver in the food. How is that going to rule out chicken as an allergy? It is the same as chicken in other dog foods correct? 

    1. according to my vet, it is hydrolyzed chicken which means all of the allergens have been taken out



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