UK Registered Veterinary Retailer

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

Hill's Prescription Diet z/d Food Sensitivities Cat Food
Dry » 2kg Bag
Ultra Allergen Free Wet » 24 x 156g Cans

  • Limited Stock Dry » 2kg Bag £22.99
  • Ultra Allergen Free Wet » 24 x 156g Cans £32.99

Selection of 2 products from

£22.99 to £32.99


Hills Z/D available from VioVet

Dietary allergies and food intolerances are surprisingly common in cats. They usually develop in young or middle aged cats and can cause a variety of problems affecting the digestion as well as the skin. Usually they will be to one or more specific proteins in the diet. None of the dietary proteins which commonly cause these reactions are present in Hill's Prescription z/d Diets, so feeding the diet for at lease 6 weeks will allow the reaction to subside and the symptoms improve.

Feeding Guide


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

Body weight kg Dry grams
2 30 - 45
3 45 - 60
4 55 - 75
5 65 - 85
6 70 - 100
7 + 12 - 14 per kg


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

Body Weight kg Cans 156g
2 3/4 - 1
3 1 - 1 1/4
4 1 1/4 - 1 3/4
5 1 1/2 - 2
6 1 2/3 - 2 1/4
7 + 1/4 per kg

A 156g can of z/dTM Feline canned is equal to 45 grams of z/dTM Low Allergen Feline dry.

Kibble image

Hills Prescription Diet z/d key benefits

Protein Single animal source: chicken liver
Extensively hydrolysed.
Reduced amount
Helps minimise adverse food reactions.
Carbohydrate Single source: rice Adverse reaction to rice is rare in cats
Essential fatty acids Increased Helps nourish the skin and coat.
Digestibility High Improves nutrient availability for patients with compromised digestive tracts
Superior antioxydant formula Added Neutralizes free radicals.



Brewers' rice, rice protein concentrate, chicken liver hydrolysate, vegetable oil, minerals, dried chicken liver hydrolysate, cellulose, taurine, vitamins, trace elements and beta carotene. Contains EU approved antioxidant.


Chicken liver hydrolysate, maize starch, vegetable oil, cellulose, calcium carbonate, DL-methionine, dicalcium phosphate, potassium chloride, iodised salt, taurine, calcium sulphate, vitamins and trace elements.

Additional information

  • Proteins with a molecular weight less than 10,000 daltons are unlikely to be detected by the immune system.
  • The animal protein in z/dTM ULTRA Allergen-Free Feline is extensively hydrolysed (a major part of the protein has less than 3,000Daltons in size) to minimise the risk to be detected by the immune system.
  • The carbohydrate source is maize starch, refined to contain less than 0.3% vegetable protein.
  • The fat source is vegetable oil, purified to contain no protein.
  • z/dTM ULTRA Allergen-Free Feline only exists as canned food, if preferred, it can be fed together with z/dTM low Allergen Feline dry, if the cat does not have an adverse reaction against rice.

Recommended for

  • Adverse food reactions (food allergy or food intolerance)
  • Use as an elimination diet to rule out adverse food reactions in case of:
    • Chronic pruritus.
    • Otitis externa.
    • Gastro-intestinal disorders such as inflammatory bowel disease (including colitis).

Not recommended for

  • Kittens
  • Pregnant or lactating queens

Need help or advice? Contact us:

  • Landline: 01582 842096
  • Mon - Fri: 8:30am - 5:00pm
  • Sat: 9:00am - 1:00pm (Collections only)
  • Email: [email protected]

All prices include VAT where applicable.

Delivery Information

How quickly do you deliver?

Under almost all products on our website is an Estimated dispatch time, check this for a delivery prediction specific to the item you are looking to purchase. These badges are updated live based on the stock levels we have and also those of our suppliers - so are usually very accurate, but cannot be guaranteed. In more general terms, we aim to dispatch all orders within 1 working day of receiving payment (and a prescription if required). If we cannot do so within 3 working days we will contact you by email.

What do you charge for delivery?

For UK delivery, we charge the following:

Order Total Weight Delivery
£0-£28.99 Under 2kg £2.99
2kg+ £4.99
£29-£38.99 Under 2kg Free
2kg+ £4.99
£39+ Under 2kg Free
2kg+ Free

Prices quoted are for delivery to all parts of mainland UK except certain Scottish postcodes (where the price is higher for items sent by courier. Delivery of food abroad (including Channel Islands, N. Ireland and other islands around the UK) is charged at a higher price and free delivery is not available. Temperature controlled products, such as Insulin, are also not always subject to the standard and/or free delivery options.

For full information on our delivery charges, including prices on heavy deliveries to Scotland and abroad, see our delivery information page.

We can deliver most items to all around the world, but prices do vary. The majority of light weight orders (less than 1.5kg) can be delivered for a flat rate of £10. For an accurate estimate of the delivery charge, please put the items you require in your basket and use the "Estimate Delivery" system on the shopping basket page (you only need to enter your country and postal/zip code) for a quick quote. For deliveries to the USA you may need to go to the checkout page and enter your full address to get a quote (as some services need your state in order to quote too). For more information on international deliveries, please see our delivery information page.

Delivery of aerosols

Due to restrictions aerosols can't be sent by Royal Mail. We appreciate your understanding.

Delivery of temperature controlled items

Some products, such as insulin and frozen food, need to be delivered in insulated packaging to prevent them from getting too warm (or too cold) during transit from us to you. Purchasing any of these items in your order will result in a £1.99 charge being added to the total to cover the high cost of the insulated packaging materials. You only pay the £1.99 once per order, regardless of how many temperature controlled items you purchase in that order.

How do I cancel or return an order?

Please call us as soon as possible if you need to amend or cancel an order on 01582 842096. If your order has been processed for dispatch we will be unable to cancel or amend the order. You will however be able to return your product for a full refund*.

To return an item, you must contact us by phone or email to arrange this BEFORE posting any product back to us. We will explain the process at this stage for you.

*For full details on returns, see our terms and conditions page.

Reviews (10)

Q & A

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

17 March 2016 at 3:00pm

The difference

Annette McDonald

  • VioVet customer since 2016
  • From: County Antrim, United Kingdom

What is the difference between the zd and the sensitive hills food as I ordered the sensitive food instead of the zd that my cat is on as he had allergies and the vet isn't sure what of all I no is that fleas are one

  • Non-Executive Director

These two diets are completely different and are used in different situations. The z/d is processed so that it cannot contain any food allergens at all (theoretically). If there is a genuine concern about a dietary allergy, z/d is a good choice. The Sensitive diet is not free of allergens and might cause trouble if a cat happens to be allergic to one of the ingredients. The good thing about the Sensitive diet is that it is generally very easy to digest, so most cats will do well on it if they are prone to diarrhoea for other reasons. It would be fine to use in a cat with a flea allergy.