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Zylkene Capsules 75mg for Small Dogs or Cats <10kg

£137.41 GBP
 per 

£3.99 Delivery (Orders up to £59.99)

Stock up and save! Get FREE Shipping when you spend £59.99 or more.
Certified and trusted products
Size: 100 capsules
Description

Pets can get stressed when they face certain situations or something in their environment changes. Many different things can contribute to a pet feeling anxious, including going into kennels or a cattery, moving house.

Why your dog or cat will benefit

  • Helps ease stress from environmental changes.
  • Suitable for small dogs or cats under 10kg.

Features & specification

  • Calming supplement capsules for small dogs or cats under 10kg, 75mg.

Delivered across the UK — free delivery on orders over £59.99.

Care

General Care & Storage
To get the most out of your Petszo delivery, please keep the following in mind:

  • Edibles: Keep food and treats tightly sealed and stored in a cool, dry environment.
  • Fabrics & Beds: Gently wipe clean or wash at 30ºC (always check the individual label first). Do not bleach.
  • Safety First: Regularly check toys and accessories for damage and remove them if broken.
  • Note: Always refer to the specific packaging for exact instructions.

Getting the most out of your Petszo order comes down to storing things properly and checking them regularly. Here's what matters.

Food and treats

Keep dry food tightly sealed in a cool, dry place away from direct sunlight. Resealing the bag or transferring it to an airtight container helps stop the fats going stale, which is the usual reason a dog or cat suddenly goes off a food they previously liked.

Opened wet food should be covered and refrigerated, and used within about 24 hours. Serve it at room temperature rather than straight from the fridge — cold food is noticeably less appealing to most pets and can be harder on sensitive stomachs.

Many treat pouches contain a small oxygen absorber sachet to keep the contents fresh. This isn't edible — remove and discard it before giving your pet the treat.

Beds, blankets and fabric items

Most fabric items can be gently wiped clean or machine washed at 30°C, but always check the individual care label first — padding and covers vary between products. Don't use bleach, as residue can irritate skin and paws.

Removable covers are worth washing more often than you'd think, particularly for pets with skin sensitivities.

Toys and chews

Check toys and accessories regularly for damage, and remove anything that's cracked, split or losing pieces. Small fragments are a genuine choking and blockage risk.

Always supervise your pet with chews and rawhide products, and take away any piece small enough to be swallowed whole. Match the chew size to your pet — a chew intended for a small dog won't last long with a large one, and creates more risk.

Harnesses, collars and leads

Check the fit periodically, especially on growing puppies and kittens. As a rule you should be able to slide two fingers comfortably under any strap — tighter risks rubbing, looser risks your pet backing out of it.

Inspect stitching, buckles and clips for wear, and replace anything showing damage before it fails on a walk.

Litter trays and small pet enclosures

Scoop clumping litter daily and top up as needed; a full change every 1–2 weeks is typical, more often with several cats sharing a tray. Clean the tray itself with hot water and mild detergent rather than strong disinfectants, some of which are toxic to cats.

For small pet enclosures, spot-clean soiled bedding daily and do a full change weekly.

Switching foods

Introduce any new food gradually over roughly 7–10 days, mixing increasing amounts into the current food. Sudden changes are one of the most common causes of digestive upset, and it's easily avoided.

Always check the product packaging. The guidance here is general — individual products carry their own storage, washing and feeding instructions, and those take precedence. If you're unsure about something, or your pet has a specific health condition, speak to your vet.

Questions about a specific product? See our FAQ or email support@petszo.co.uk.

FAQ

Frequently Asked Questions (FAQ)
We’ve compiled answers to the most common questions about shopping at PETSZO. Can’t find your question? Contact us at +44 7782 276061 or email us at support@petszo.co.uk.

1. What are your delivery times?
Orders are typically processed within 1–3 business days and spend 2–4 business days in transit. You can generally expect your order to arrive within 3–7 business days total. Once your order is dispatched, you will receive tracking information to monitor its progress.

2. What if my order is late?
While we strive for prompt delivery, carrier delays can occasionally happen. If your order does not arrive within the expected timeframe, please reach out to us. If a package is confirmed lost or significantly delayed by the courier, we will issue a replacement or a refund to ensure your complete satisfaction.

3. Can I return an item?
Yes. In compliance with UK Consumer Law, we offer a 14-day return period for most unused and unopened items in their original packaging. Please check our Refund & Return Policy for details and hygiene-related exemptions.

4. How can I track my order?
After your order is shipped, we will provide tracking details via email. You can use this information to check the delivery status directly with the carrier.

5. How do I contact customer support?
If you have questions about your order, shipping, or products, reach out to our support team:
Phone: +44 7782 276061
Email: support@petszo.co.uk

Answers to the questions we're asked most often. If yours isn't here, call +44 7782 276061 or email support@petszo.co.uk and we'll help.

Delivery

How long will my order take to arrive?

We aim to dispatch orders within 1–7 business days of you placing them. Delivery time after dispatch depends on the shipping method chosen at checkout. You'll receive tracking details by email once your order is on its way, so you can follow its progress with the carrier.

Do you offer free delivery?

Yes — delivery is free on all UK orders over £59.99. Orders below that threshold are charged at the rate shown at checkout before you pay.

Where do you deliver?

We currently deliver within the United Kingdom only. We don't ship internationally at present. Please note that a small number of items are shipped from outside the UK and may take a little longer to arrive — this is noted on the individual product page where it applies.

What if my order is late?

Carrier delays occasionally happen, particularly around public holidays or in bad weather. If your order hasn't arrived within the expected timeframe, get in touch with your order number and we'll chase it. If a package is confirmed lost or significantly delayed by the courier, we'll send a replacement or issue a refund.

How do I track my order?

Once your order ships, we email you tracking details. Use these to check live delivery status directly with the carrier.

Returns & refunds

Can I return something if I change my mind?

Yes. Under UK consumer law you have 14 days from receiving your order to tell us you'd like to cancel, and a further 14 days to send the items back. Items need to be unused, in their original packaging and in the condition you received them. Return postage for change-of-mind returns is at your cost. Full details are in our Refund & Return Policy.

What if my order arrives damaged or incorrect?

We'll put it right. Under UK law you have up to 30 days to reject a faulty item for a full refund. For transit damage, contact us ideally within 48 hours of delivery with photos of both the item and the packaging. We cover return postage on faulty or incorrect items and will offer a full refund or a replacement.

Are there items I can't return?

For hygiene and safety reasons, opened or unsealed pet food and treats, used grooming products, personalised items and gift cards can't be returned unless they're faulty.

How long do refunds take?

Once we've received and inspected your return, we'll let you know whether it's approved. Approved refunds are processed within 14 days of us receiving the goods, back to your original payment method.

Can I cancel an order before it ships?

Yes — email support@petszo.co.uk with your order number any time before dispatch. If it's already gone out, you can return it under the 14-day change-of-mind period once it arrives.

Products

Do I need a prescription for veterinary diets?

No prescription is legally required in the UK to buy veterinary diet foods. However, these products are formulated for diagnosed conditions, so we strongly recommend speaking to your vet before starting one — and having your pet checked at least every six months while feeding it. If your pet's health worsens, seek veterinary advice straight away.

How should I switch my pet to a new food?

Gradually, over roughly 7–10 days. Mix a small amount of the new food into the current one and increase the proportion each day. Switching abruptly is a common cause of digestive upset.

How do I store pet food once it's open?

Keep dry food in a cool, dry place, ideally resealed or in an airtight container to stop the fats going stale. Opened wet food should go in the fridge and be used within about 24 hours. Always check the individual packaging, as some products have specific requirements.

Contact

How do I get in touch?

Phone: +44 7782 276061
Email: support@petszo.co.uk

Please include your order number when contacting us about an existing order — it speeds things up considerably.

Shipping & Returns

Last updated: 16 August 2026

This policy explains how we process, dispatch and deliver orders, and what to do if something goes wrong.

1. Delivery charges

Delivery is free on all UK orders over £59.99. For orders below that value, the delivery charge is calculated and shown at checkout before you complete your purchase — you'll never be charged an amount you haven't seen first.

2. Order processing and dispatch

We aim to dispatch orders within 1–7 business days of the order being placed. Business days are Monday to Friday, excluding UK public holidays.

Once your order has been processed you'll receive a confirmation email, followed by tracking details where available.

3. Delivery times

Time in transit after dispatch depends on the delivery method selected at checkout and your location. Total time to receive your order is therefore the dispatch window above plus the carrier's transit time.

A small number of products are shipped from outside the UK and take longer to arrive. Where this applies, it is stated clearly on the individual product page.

4. Delivery area

We currently deliver within the United Kingdom only. We do not offer international shipping at present.

Please note that a small number of bulky items cannot be delivered to Northern Ireland. Where this restriction applies, it is noted on the product page.

5. Tracking your order

Once your order ships, we'll email you tracking information where available. You can use this to check the live delivery status directly with the carrier.

6. Delays

Some delays are outside our control — carrier backlogs, severe weather, and public holidays being the most common. If your order hasn't arrived within the expected timeframe, please contact us with your order number and we'll investigate.

If a package is confirmed lost or significantly delayed by the courier, we will send a replacement or issue a refund.

7. Incorrect delivery addresses

Please check your delivery address carefully at checkout. If you spot a mistake, contact us immediately — we can usually correct it before dispatch. Once an order has shipped to an address you provided, we may not be able to recover it.

8. Contact us

For any questions about shipping or the status of an order:

Phone: +44 7782 276061
Email: support@petszo.co.uk

Please include your order number — it makes everything faster.

Petszo is a trading name of UZMA QASIM LTD (company number 16856550). We reserve the right to update this policy; the date at the top of this page reflects the most recent revision.

See also: Refund & Return Policy · FAQ

  • 5 stars: 14 (70%)
  • 4 stars: 3 (15%)
  • 3 stars: 3 (15%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
A
Alfie
Great, but use with caution

This works great on my older cat. She’s had no issues.\nHowever, if your cat is nervous or anxious because of territory aggression, it’ll make them much more aggressive. Found this out the hard way when I gave them to my younger cat. She became incredibly aggressive to older cat.\nI googled and it’s a known side effect. \nJust be aware of the type of anxiety before using, especially in a not necessarily harmonious multi-cat home

M
Marion, DJ und Missy
Missy is thawing out.

When Missy was brought to me by the cat protection association a week ago, I thought it was the biggest mistake ever. A cat that’s scared of people and lives under the bed. I started looking for something to ease her anxiety and came across this product. After the third dose, she’s already more curious and even comes out from under the bed when I’m at home. Sure, it’s not exactly what I had hoped for, but it’s already a huge step forward after just one week. I’m happy and grateful to have found this product.

J
J.T.
Super item

I was recommended these capsules by the vet. My tomcat was suffering from extreme stress and behavioural issues. Now, after 10 days of use, I can truly say there’s been a change. He’s become calmer and more relaxed. Slowly, his old self is coming back. I will definitely continue using the capsules and can recommend them.

A
Ahu
Works!

My two cats can't stand each other. Previously, I tried those collars that are supposed to calm cats down. They didn't help. For one of my cats, I mix the powder into her wet food. It seems to be tasteless, as she accepted it straight away. I've noticed that she has actually become braver and dares to get closer to the other cat more often. Unfortunately, with the other cat, I have the problem that she exclusively eats dry food. I don't know how I should give it to her.

J
Jacob
Excellent

I've been using Zylkene for years now & swear by it. I see an immediate difference in my cats when they have eaten it in their food, great to support cats during anxious times. I love that it's a natural product, no chemicals & that it doesn't have any side effects or addictive qualities. The only thing I've noticed is if you don't use them fairly quickly, the powder does start to solidify, but if that happens the solidified powder can be moulded on to a treat & given that way! I love it.

D
Di Pascal
It's OK

Firstly, having used this product daily for many years, I was astounded to see the cost on here! Over twice as much as I've recently paid, PetsZo! Not like you, why so?\nI open one capsule into a Vitakraft liquid treat every night and it seems to calm my very anxious Bonnie somewhat.

B
Birgit crusius
Zylkene

RUDI has now been taking Zylkene for 10 days and I’m surprised (I was sceptical at first). After mourning his sister, we brought Dimka to us. The two of them didn’t become friends, they didn’t fight or hiss, but Rudi was (is) afraid of her. Dimka seeks closeness and Rudi sees it as an attack... the last two days there’s been a bit of progress, but this morning I was gobsmacked. Rudi was tearing around the flat like a lunatic, and of course Dimka just stared at him in disbelief as he zoomed past her.

t
thea
life changing

My bonkers bengal has been on one a day for the last 7 years. There do not seem to be any long term effects and life is so much easier. I have tried taking him off them but he reverts straight away to hunting my little oriental cat again. Do try, it's made my life and the oriental cats' life almost stress free.

C
Clara
Will use these for life!

GREAT! I’ve used these previously as recommended by the vet (but they cost a lot more when they prescribed it than on PetsZo). It’s AMAZING! I know all cats can be different, but I would highly recommend trying these. I have found no other calming or stress relief works and she doesn’t like Feliway. These are great, easy to use, and my cat loves to eat it. The second it’s on her food bowl she goes straight over and eats it up! Highly recommend, great natural product with great effects.

L
Lucy
Very impressive results. Nervous cat is now much more relaxed.

Our male cat is an ex-stray and has always been nervous. After our other male cat was recently put to sleep, he started over-grooming his belly and chasing his tail. Feliway didn't help and having had a traumatic experience years ago with a previous cat prescribed Valium for tail chasing, I wanted to avoid medication. Within days of taking Zylkene he stopped chasing his tail & one month later his belly fur is starting to re-grow. Will continue using until the large,bald patch is gone.

V
Victoria Jones
Brilliant product

I have been given this to my nervous cat for a while and she has really improved, she use to lick herself so much that she gave herself bald patches and sores and now she has stopped this all together, this product is brilliant.

P
PK
Simply thrilled!

Our cat started urinating on the bed and sofa. She also changed a lot after the birth of the little ones and hardly let herself be stroked. She always seemed stressed and, to be honest, almost depressed. After just one week of using this, I can hardly recognise our cat anymore. She’s sociable again, cuddly, outgoing, gets along with the other two cats, and most importantly, the urinating has completely stopped. I’m so thrilled and can only recommend it!

C
Charlotte
Simply brilliant!!!

So far, I’ve never written a product review, but in this case, I’m simply thrilled! \n,We brought in a second cat to join our 1-year-old tomcat, but they absolutely didn’t get along. Our older tomcat was constantly hissing and seemed depressed—you could see that he wasn’t doing well. After using Zylkene (2 capsules/day during the first week), there was a quick change in mood and peaceful coexistence followed shortly after.

A
Alex
seems to work well!

Our vet recommended this for my cat with stress-related cystitis, as he's generally highly strung and has a nervous personality. From the first time we dosed his food, this seemed to make him waaay more mellow! Will buy the two-pack next time.

F
Fiebig
Unfortunately, no effect.

Unfortunately, this didn’t work at all for our little tomcat. The plan was to get him into the transport box and take him to the vet for neutering. But it seems that wasn’t the solution to the problem. 🤷 He was calm and a bit tired 😂, but he knew exactly what was going on. Looks like I’ll have to resort to the heavy chemical stuff. Still, I’ll keep it and save it for another situation.

J
Jack
This works

We have a cat who tends to be quite highly strung and she was over-grooming. Zylkene resulted in an improvement quite quickly and she now has a complete coat of fur. We tried to take her off it early on and she relapsed so she now has a low 'maintenance' dose but we aim to get her off it in due course. Stick with it - it will take time but it does work. We mix it with lick-e-lix, but whatever your cat loves will work.

S
Susanne
Absolutely brilliant product

I ordered the product because our cats had a long flight ahead of them. One of our cats, in particular, is extremely anxious. I started giving her Zylkene two weeks before the flight. After just 24 (!!) hours, the cat was like a completely different animal. She let us pet her without any fuss and was much, much friendlier. Absolutely recommended!

M
Michael B.
Highly recommended!!!

Our cat recently had a pretty severe flea infestation, which we struggled to get rid of. As a result, she became quite restless and licked various spots on her body bald. On top of that, hormonal issues arose, which led to territorial marking even inside our home. Since we started adding Zylkene to her food, things have noticeably improved. It takes at least a week to really start working, but her fur is growing back, and the cat is much more relaxed!

D
Di Pascal
It works!

My beautiful rescue Maine Coon cross had been badly treated before I found her. After 3 years of love and patience, she's fine with me, but still disappears as soon as anyone visits. She's terrified of fireworks and practically any loudish noise. Zylkene was recommended by the vet, and I use them before and during noisy times, along with a Feliway plug-in at all times. It's a natural, gentle treatment for anxiety, and it works, without any drowsiness at all.

I
Isabella
Simply brilliant

My tomcat started grooming himself completely bald, especially on his belly, under his legs, and on the sides, after his friend passed away and he also had surgery. This product worked brilliantly—after five months, his fur was back to how it used to be, with no bald patches, and he seemed much calmer and more balanced again. I can only recommend it; it really seems to do the soul good after such tough experiences.