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Zylkene Chews

  • 10-30kg » Pack of 14 £20.99
  • 15-60kg » Pack of 14 £33.49
  • <10kg » Pack of 14 £12.49

Selection of 3 products from

£12.49 to £33.49


Zylkene® chews are tasty treats that help dogs cope with stressful situations. A calmer pet is less likely to develop undesirable behaviors. Zylkene® is the first milk-derived nutritional supplement with clinically proven calming benefits. The chews are exclusively offered in veterinary clinics.

Alpha-casozepine in a tasty treat to help dogs cope with stressful situations and facilitates prevention of unwanted behavior. Alpha-casozepine* promotes and enhances relaxed behavior in pets. It is an ingredient derived from a milk protein which has calming properties. Learning new behaviours is easier in a relaxed animal.

Directions for Use of Zylkene®

The chews can be administered orally as a single dose.

Short term use: Use for 1-2 days before the predicted event or change in environment. Some animals may benefit from an even earlier administration. (5-7 days).

Longer term use: 1-2 months.

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.


Q & A

Below are some recent questions we've received regarding Zylkene Chews, including answers from our team.

4 November 2018 at 9:47pm

Milk allergy

Kaye Smith

  • VioVet customer since 2018
  • From: North Yorkshire, United Kingdom

Can I ask would these be okay for a dog who has a milk allergy

  • Website Content Developer

Hi there,

As Zylkene® is a milk-derived nutritional supplement, we would not recommend feeding it to a dog with a milk allergy.


24 September 2018 at 9:09pm

Allergy question


Does this contain chicken or beef?

  • Customer Service Advisor


Thank you for your question.

Zylkene does not have any chicken or beef in it, it is an ingredient derived from a milk protein.

Hope that helps,


18 September 2018 at 8:42pm

Different g


There are 3 different sizes of chew 75g, 225g and 450g. Is there a recommendation for dog weights to go alongside each chew size?

  • Customer Service Advisor


Thank you for your question.

These are for under 10kg, 10-30kg and 15-60kg.

Hope that helps,