Hill's Prescription Diet z/d Food Sensitivities Dog Food

Hill's Prescription Diet z/d Food Sensitivities Dog Food Hill's Prescription Diet z/d Food Sensitivities Dog Food Hill's Prescription Diet z/d Food Sensitivities Dog Food
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Dry » 3kg Bag Dry » 3kg Bag Dry » 3kg Bag
Mini Dry » 1.5kg Bag Mini Dry » 1.5kg Bag Mini Dry » 1.5kg Bag
Wet » 12 x 370g Cans Wet » 12 x 370g Cans Wet » 12 x 370g Cans

Images are for illustration purposes only. Packaging may change from time to time and images on our website may or may not be updated.

  • Dry » 3kg Bag £25.99
  • Dry » 10kg Bag £59.99
  • Mini Dry » 1.5kg Bag £15.74
  • Mini Dry » 6kg Bag £46.99
  • Limited Stock Wet » 12 x 370g Cans £34.99

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£15.74 to £59.99


Hills Z/D available from VioVet

Hill's Prescription Diet Canine z/d is a unique combination feed, developed to aid dogs with numerous food allergies and intolerances, which can often lead to the onset of further health conditions such as digestive difficulties. Allergies and intolerances are typically an adverse response to food proteins, and Hill's Prescription Diet z/d has been specially formulated to counter-act these proteins and lower the risk of allergies arising from beef, wheat and dairy products.

Feeding Guide


Body Weight kg Dry grams
2.5 50 - 70
5 85 - 120
10 145 - 200
20 245 - 340
30 330 - 460
40 410 - 570
50 485 - 670
60 + 9 - 12 per kg

These ranges are a starting point only, because dogs' needs vary. Adjust the feeding amount to maintain the optimal body weight.

A 156g can of z/d ULTRA Allergen-Free Canine canned is equal to 40 grams of z/d Low Allergen Canine dry and a 370g can of z/d ULTRA Allergen-Free Canine canned is equal to 95 grams.


These ranges are a starting point only, because dogs' needs vary. Adjust the feeding amount to maintain optimal body weight

Body Weight kg Cans 370 g
2 1/2 - 3/4
3 2/3 - 3/4
4 3/4 - 1
5 1 - 1 1/4
10 1 1/2 - 2
20 2 1/2 - 3 1/2
30 3 1/2 - 4 3/4
40 4 1/4 - 6
50 5 - 7
60 + 1 per 10 kg

A 370g can is equal to 95 grams of the dry food.

Kibble image

Hill's Prescription Diet z/d key benefits

  • Hypoallergenic - carefully crafted with highly hydrolysed animal protein & single purified carbohydrate source.
  • Nutrition for visible improvement in skin & coat in 30 days.
  • Clinically proven to help improve stool.
  • With great taste your dog will love



Maize starch, chicken liver hydrolysate, cellulose, minerals, soybean oil, animal fat, vitamins, trace elements, taurine and beta-carotene. With a natural antioxidant (mixed tocopherols).


Chicken liver hydrolysate, maize starch, cellulose, soybean oil, minerals, trace elements, vitamins, taurine.

Need help or advice? Contact us:

  • Landline: 01582 842096
  • Mon - Fri: 8:00am - 6:00pm
  • Sat: 9:00am - 1:00pm
  • Email: [email protected]

All prices include VAT where applicable.

Reviews (174)

Summary of Reviews for Hill's Prescription Diet z/d Food Sensitivities Dog Food

Overall 5
Value For Money
Pet's Opinion
Nutritional Value
169 out of 174 (97%) customers would recommend this product.
5 stars (129 reviews)
4 stars (39 reviews)
3 stars (2 reviews)
2 stars (1 reviews)
1 stars (3 reviews)

Only verified purchasers of this product can leave a review.

55 Hills Prescription diet
Verified Purchase

By on 19 April 2021

Excellent for dogs with dodgy tummies

Customer recommends this product

45 Vet Recommended
Verified Purchase

By on 7 April 2021

This food was recommended by our vet for our Weimaraner who has several allergies.

Customer recommends this product

55 Speedy Delivery
Verified Purchase

By on 9 March 2021

Nice look and smells tempting for my pet. Using as a vet recommendation for gastric problems. So far so good.

Customer recommends this product

45 Does what it says on the tin!
Verified Purchase

By on 8 March 2021

It’s good for our digs allergies & he seems to like it!

Customer recommends this product

45 It works for my dog
Verified Purchase

By on 20 February 2021

My dog has extreme reaction to all sorts of stuff this food seems to work. It's taken a while to get her used to it, but, now she loves it.

Customer recommends this product

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Q & A

Below are some recent questions we've received regarding Hill's Prescription Diet z/d Food Sensitivities Dog Food, including answers from our team.

15 April 2021 at 8:02am

Long list of allergies

Teri Wise

Hello, my dog Luna is a Tibetan Mastiff and has a very long list of allergies, these were discovered by blood tests conducted after a long period of ear infections and itchy paws/skin. I have listed the allergies below:

White Potato

Would this food be suitable to feed Luna?
Thank you

(I have listed all of her food allergies to aid your answer but also to hopefully help other dog owners who's pets suffer from one or all of the above to help them)

For other owners also, Luna is also allergic to trees, weeds, grass, moulds and mites! We use a prescription of Apoquel to aid her with this which is a very fast acting and helpful drug.

  • VioVet Staff

Hills Z/D is a hydrolysed protein diet. This means no matter what the original protein source in it is, it cannot cause a reaction in your dog. The proteins are specially processed so the body does not react to them.
It is a great choice for your allergic dog as you can guarantee it will not set off Luna's allergy. It must be fed as the only diet for this though (no treats/scavenging). It is also a veterinary diet so any use of it should be run past your vet first.

I recommend reading our blog 'Allergies in cats and dogs - a vet guide' for a good summary on allergies and how to use foods like this.

12 December 2020 at 7:07pm

Food quantity

Jennie Hill

I want to feed my 10kg cockatoo who suffers from pancreatitis the correct mix of your I/D food
What quantities do you suggest for the mix.

  • VioVet Staff

I assume you mean '10kg Cockapoo' not Cockatoo? I do not recommend using the Hills Z/D for your dog with pancreatitis as it is not a low fat diet and it is intended for use in dogs with food allergies/intolerances. I recommend using the Hills I/D Low Fat food for your dog with pancreatitis. This should ideally be fed as the only diet, feeding guidelines can be found on the packaging itself.

13 September 2019 at 7:05pm

Mini zd and the normal

Joanne George

  • VioVet customer since 2019
  • From: Tyne and Wear, United Kingdom

Are the kibbles exactly the same just the size? Which is better for a french bulldog and can it be mixed with the wet food? Or should you stick to one or the other?
Thank you

  • VioVet Staff


Thank you for your question,

The mini z/d is smaller kibble but the formulation is the same across the different sizes. I'd probably give a French Bulldog the mini version unless you know he likes larger kibble - personal preference really :-)

You can use the wet and dry together - the easiest option if your dog is fed twice a day would be to feed dry for one meal, and wet for another. Or you can mix but just take care whichever way you do it to reduce the total daily amount of each appropriately so that your dog received the correct amount of calories per day.

I hope this helps!

22 September 2015 at 2:07pm

Redness of skin

Lisa mayle

My dog has finished her steroids and anti biotic about a week ago. She has been on z/d for nearly three weeks. Her skin has started to go red again and has started to lick her paws again. Does this mean the allergy is not food related X

  • VioVet Staff

This is suspicious and it might rule out a food allergy, but it is too early to say. Some dogs do need more than 3 weeks to show a full response. Also some dogs will pinch a small amount of food (bread, biscuit etc) and if they happen to have a wheat allergy, or some other constituent of what they ate, they will react again. I would certainly suggest that you give the diet more time, but you are right and it might prove that this is not purely a dietary allergy. It is a bit too early to be sure about that.

2 May 2015 at 7:33am

Allergic to potatoes

bailey bobs

My dog is allergic to potatoes corn wheat and rice has severe skin. Allergies tothese myvet has put him on hills zd he loves it.but notice this has potatoes in.

  • VioVet Staff

All the proteins in Hills z/d have been treated to make sure that they are not recognised by the immune system. This means that even if potato is bad for your dog (which is unusual but certainly possible) it is OK to give him this particular food. [The proteins are "hydrolysed" which means they are broken down into smaller molecules. This does not affect their nutritional value, but makes them unable to cause an allergic response.]

25 January 2015 at 7:36pm

ZD 156g cans

C Berman

  • VioVet customer since 2012
  • From: London, United Kingdom

Please can you tell me if the 156g tins are permanently discontinued?

  • VioVet Staff

Yes, Hills have discontinued the 24 x 156g cans and replaced them with the 12 x 370g cans.

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