Best Probiotics for Dogs: Improve Gut Health Naturally

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As devoted dog lovers, many of us are turning to supplements to give our furry friends an extra boost of nutritional support.

A healthy digestive system is the cornerstone of a dog’s overall wellbeing, influencing everything from metabolism and digestion to mood and behaviour, all closely connected in a delicate balance.

photograph : smart bark

Common signs of digestive discomfort in dogs include inconsistent stools, diarrhoea, constipation, and tummy upsets. Fortunately, these issues can often be eased by adding probiotics to their diet.

Probiotics are made up of “good” bacteria that help improve gut health. They offer a range of benefits such as reducing gas, promoting firmer stools, and supporting a happy, well-functioning digestive system.

By nurturing the gut, probiotics can help your dog feel healthier and happier from the inside out.

We’re taking a closer look at five of the most popular probiotics for supporting your dog’s gut health.

We’ll break down how they’re delivered (chew, tablet, powder, food additive), how tasty they are, what’s inside them, and ultimately help you find the best match for your dog’s specific needs.

⏰ UPDATE SEPTEMBER 2026: We’ve expanded our Zesty Paws entry to include their new Probiotic Rapid Care Paste, a fast-acting partner to the daily chews.

TABLE OF CONTENTS

• Buying Advice for Probiotics for Dogs
• Our Picks of the Best Dog Probiotics
  • 1. Best Overall Dog Probiotic: Pooch & Mutt
  • 2. Best Value Probiotic: GWF Nutrition
  • 3. Best Probiotic Chews & Rapid Care Paste: Zesty Paws
  • 4. Best Probiotic Tablets: YuMOVE
  • 5. Best Probiotic Range: Buddy & Lola
• Our Verdict
• FAQs

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Buying Advice for Probiotics for Dogs

A quick word about supplements for dogs.

We've found that supplements can be a very confusing area to investigate. Many of the supplements and their ingredients have real theoretical benefits.

However, we've found that whilst independent research is still limited, there is an abundance of anecdotal evidence to help dog lovers select a product.

Here are some general guidelines to bear in mind when you are choosing a probiotic supplement for your dog :-

Know the difference between probiotics and prebiotics

Probiotics and prebiotics are often misunderstood. Probiotics (sometimes called microbiotics) are foods or supplements that contain a source of live, beneficial bacteria. Prebiotics, provide sustenance to these bacteria. Many of the products we feature contain a combination of both.

Choose a palatable option

Do you have a picky pup Our review of dog probiotic supplements includes a range of tablets, powders, pastes and chews so you can decide which is most palatable for your dog, because you know them best!

Select a probiotic with a money-back guarantee

That way, you can try the supplement and see if it works for your dog without any risk. All the products in this review offer a minimum 30 day money-back guarantee

Chat to your vet

We recommend talking to your vet about which probiotic is most suited to your dog's needs.

All the brands featured in our review can be bought as a one-off purchase or you can take advantage of their subscription service to make substantial savings.

Our Picks of the Best Dog Probiotics

1. Best Overall Dog Probiotic: Pooch & Mutt

Pooch & Mutt is one of the UK's most award-winning premium pet food brands. Their focus is on natural, functional products and their first ever product - Bionic Biotic features in first place in our review.

Bionic Biotic is one of their best sellers, so let's take a closer look at why so many dog lovers swear by it.

photograph : pooch & mutt

A vet recommended probiotics for dogs, it's packed full of natural ingredients and designed to be sprinkled over your dog’s food.

Perfect if your dog dislikes taking tablets, as it's super easy to incorporate into your dog’s normal feeding routine. If you feed kibble then you can mix the powder with salmon oil before adding to dry food to help it 'stick'.

The main reason we've awarded it top place in our review is because it's a multipurpose supplement with a comprehensive range of benefits for your dog including -

⭐️ Improves digestion & solid stools

⭐️ Prevents itching & scratching

⭐️ Improves skin & coat health

photograph : smart bark

So ultimately, by adding this one supplement to your dog's diet, you can address several common problem areas at once.

In testing over the course of 2 months, we found a marked improvement in our testers stools. All poop throughout the day was solid and the frequent scooting stopped.

Bionic Biotic contains chicory root which is an excellent fibre source. This natural fibre helps increase the size and weight of your dog's stool whilst softening it to make it easy to pass. So it can relieve constipation, diarrhoea and end that dreaded scooting !

Another key ingredient, Salmon Oil, is a rich source of Omega 3 fatty acids which can help lessen inflammation caused by allergies or other skin issues.

Ultimately, Pooch & Mutt are so confident in Bionic Biotic that they offer a money back guarantee for online purchases.

photograph : pooch & mutt

It's worth mentioning that Pooch & Mutt also offer a range of three meaty probiotic dog treats and have recently launched Peanut Butter Probiotic Treats. These vegan, grain free treats contain dietary fibre, Tapioca which benefits pooches with allergies and sensitivities, and Probiotics to help digestion and nutrient uptake.

Our Verdict - With many lovers seeing a difference within 3 weeks and countless 5 ⭐️ reviews talking about digestive problems disappearing, we think Bionic Biotic is a great all-round super supplement.

Form : Powder

Quantity: 200g (lasts 10-25kg dog a month)

Reasons to Buy

+ Multipurpose health supplement

+ Natural ingredients

+ Easy to add to current food

Reasons to Avoid

- If you're looking to treat a specific health issue

Buying Options

For 20% OFF simply enter

discount code SMARTBARK20 at checkout

View on Pooch & Mutt

A happy gut often shows up as calmer skin, which is why probiotics can help itchy dogs. For the fuller picture, see our guide to why your dog is itching and how to tackle it.

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2. Best Value Probiotic: GWF Nutrition

Calling all picky pups and exasperated dog lovers!

GWF Nutrition is a well-respected UK manufacturer with over 50 years' experience in specialist supplements for dogs, cats and horses. We have already rated their Joint and Raw Aid supplements, so were keen to try their popular probiotic and prebiotic, Digestive Aid for Dogs.

photograph : smart bark

It is designed for dogs with poor stools (constipation or diarrhoea) or those struggling to absorb nutrients.

On a raw diet our own tester rarely scoots, but his poos can swing from hard to runny within a single walk, so we were keen to see if probiotics and prebiotics could steady things.

It packs a lot into one scoop: probiotics and prebiotics to nurture good gut bacteria, anti-inflammatories, antioxidants and acid buffers to balance digestion, the vet-approved herbal blend Verm-X for gut hygiene, high levels of Omega-3, and GWF's own Oatinol Delivery System to boost absorption of active ingredients, vitamins and trace elements.

Best of all, you simply add it to food.

We loved the resealable bag which comes with a measuring scoop, and the tiny 2mm pellets mix beautifully into wet or raw meals, ideal for the fussiest of dogs.

photograph : smart bark

After a month of testing, our dog's poos were noticeably more consistent, firmer and easier to pick up.

Value is excellent: a single 500g pack lasts a small dog (under 15kg) around 100 days, a medium dog (16 to 30kg) 50 days, and a large dog (31 to 45kg) 25 days.

GWF are so confident they offer a full money-back satisfaction guarantee across their pet range.

photograph : gwf nutrition

Our verdict: effective, affordable and effortless to use, Digestive Aid is a brilliant everyday addition to your dog's routine.

Form : Pellets

Quantity: 500gm

Reasons to Buy

  + Probiotic & Prebiotic

  + Very palatable

  + Great value

  + Unique delivery system

Reasons to Avoid

  - If you prefer treats or chews

Buying Options

Get 10% OFF with discount code SMARTBARK

View on GWF Nutrition

View on Amazon

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3. Best Probiotic Chews & Rapid Care Paste: Zesty Paws

Ready for tails to wag? Say hello to Zesty Paws, a US pet supplement superstar with over 350,000 five-star reviews, and their range is now available in the UK.

Zesty Paws' supplements are the work of a team of vets, scientists and nutritionists, tackling everything from tummy troubles and itchy skin to struggling joints and calmer pups.

They now offer two ways to support your dog's gut: daily chews for steady, long-term care, and a new rapid-care paste for those sudden upsets.

photograph : smart bark

Zesty Paws Probiotic Chews are designed to nurture gut health, boost natural defences and keep things moving regularly, taken everyday

Their special triple-action blend features EpiCor, Calsporin and Fructo-oligosaccharides (FOS). Yes, it sounds a bit like a science class! But all you really need to know is that these powerful ingredients work together to boost your dog's immune system, support a happy gut and keep digestion on track.

So, what did we make of the testing? The Probiotic Chews come in a tub of 90 adorable little heart-shaped bites. These chews were incredibly palatable, and even our notoriously picky Cockapoo couldn't get enough of them!

photograph : smart bark

Our tester noticed their dog's poos were often a bit runny by the end of the day and needed firming up. After 10 days, they saw a real change, with poos becoming more consistent and regular.

How much you give, and how long a tub lasts, depends on your dog's size:

Small dogs (under 15kg): 1 chew a day, so a 300g tub lasts about 90 days

Medium dogs (15 to 30kg): 2 chews a day, so a 300g tub lasts around 45 days

Large dogs (over 31kg): 3 chews a day, so a 300g tub lasts roughly 25 days

Give it at least four weeks for the best results, and it is totally risk-free: if the chews don't deliver, or your dog is not a fan, you'll get a full refund, no questions asked.

Daily chews are brilliant for steady, everyday support, but what about those out-of-the-blue upsets, the dodgy tummy after a diet change, a holiday, a course of antibiotics or a sneaky bin raid?

photograph : smart bark

That is exactly where Zesty Paws' new Probiotic Rapid Care Paste comes in, a fast-acting partner to the chews for when your dog's digestion needs help in a hurry.

It is vet-formulated for the first signs of loose stools and works on four fronts, with every ingredient pulling its weight:

⭐️ Kaolin, a natural clay that soaks up excess moisture in the gut and helps firm runny stools fast

⭐️ A probiotic (Enterococcus faecium) to top up the good bacteria

⭐️ A prebiotic (beta-glucan) to feed those beneficial bacteria

⭐️ A postbiotic (L. helveticus) to help protect and maintain the delicate gut lining

Together they tackle a flare-up from every angle.

In testing it was wonderfully easy to administer, we simply squeezed it straight into Freddie's mouth from the syringe, though if your dog isn't keen you can add it directly to their food instead.

It's very palatable, and there is a handy dial on the plunger so you can see exactly how much to give.

Zesty Paws recommend 1ml per 5kg of body weight, twice daily. So for a 15kg dog that is 3ml morning and night, meaning a 30ml tube lasts around five days, ideal for the recommended two to three day course to settle things down.

If the upset carries on beyond that, check in with your vet. Suitable for dogs from four months (and if your dog is on antibiotics, give the paste at least two hours apart).

Our verdict: Used together, the chews and the paste make a smart pairing, the chews for daily, long-term gut health, and the paste to reach for the moment a flare-up strikes. Treats and pastes can be a pricier route, but Zesty Paws offer really good value, and it is reassuring to have a fast fix in the cupboard.

Form: Chews (300g tub, also 60-count pouch and trial packs) and Paste (30ml syringe, RRP £16.99).

Dosage: Chews, 1 to 3 a day by size; Paste, 1ml per 5kg twice daily (a 30ml syringe lasts a 15kg dog about five days).

Reasons to Buy

+ Daily chews for ongoing gut health, paste for sudden upsets

+ Probiotic, prebiotic and postbiotic support

+ Fast-acting paste firms loose stools in a couple of days

+ Tasty and palatable, even for picky pups

+ Great value for most dogs

Reasons to Avoid

- Chews work out pricey for dogs over 30kg

- Paste is a short-term fix, not a daily supplement

Use discount code SMARTBARK15 for 15% OFF

one-time purchases (not subscriptions)

View on Zesty Paws

View on Amazon

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4. Best Probiotic Tablets: YuMOVE

The UK’s no.1 veterinary joint supplement brand YuMOVE have been researching supplements for more than 15 years. Their popular probiotic - Digestive Care is made specifically for dogs.

YuMOVE Digestive Care is a daily supplement tablet containing a variety of prebiotics and probiotic bacteria specifically developed to support your dog's digestive health.

photograph : yumove

It's specifically formulated for dogs with sensitive tummies to -

 ⭐️ Support digestive health

 ⭐️ Maintain firm stools

 ⭐️ Reduce excessive wind

Formulated with their ActivBio™ complex, the active ingredients work together to maintain a healthy natural balance in your dog's digestive system to keep their tummies on track.

It also contains added probiotic bacterial strain Enterococcus faecium. This has been shown to alleviate symptoms of intestinal inflammation in human clinical trials and animal feed supplementation studies.

In tablet form, you can add it to your dog's food or it can be taken by hand. If you struggle with a picky eater then the tablet can be crushed over their food. The tablets are available in 120's or 300's.

It's worth noting that YuMOVE offer a 6 week money back guarantee with all their supplements.

Our Verdict - YuMOVE are the largest company to feature in our review and as a global leader in pet health care they support over 2 million dogs ever year. Their Digestive Care tablets are a very good value probiotic, so if your dog is happy to eat tablets, then YuMOVE could be the option for you.

Form : Tablet

Quantity: 120 or 300 count (11-25kg dog 2 tablets daily)

Reasons to Buy

  + UK’s no.1 joint supplement brand

  + Designed specifically for dogs

  + 6 week money back guarantee

  + Excellent Subscribe & Save offers

Reasons to Avoid

  - Tablet form not ideal for picky dogs

  - Most expensive option in our review

Buying Options

Use code SAVENOW for 50% off your first 2 months

View on YuMOVE

View on Amazon

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5. Best Probiotic Range: Buddy & Lola

Buddy & Lola offer a wide range of health and wellness supplements for dogs aimed at some of the more common health concerns including joint mobility, digestive issues, dental health, anxiety and allergies.

Their best-selling product is Super Tummy Daily which is adored by dog-lovers and receives rave reviews.

photograph : smart bark

Available as a powder to sprinkle over food or alternatively as a daily chew. We love that Buddy & Lola provide an option so if you have a super fussy dog, you can chose the form that you think will be most palatable.

Super Tummy combines beneficial bacteria, digestive enzymes, prebiotics and probiotics in the optimal blend to heal your dog's digestive system and to maintain a healthy, balanced gut microbiome.

Regular use will help to:

⭐️ Boost beneficial gut bacteria

⭐️ Supports healthy ears & paws

⭐️ Maintain firm, healthy stools

⭐️ Support digestive health

In testing, the chews went down a treat ! They are plant based which is a great choice if you have a dog with sensitivities, but cleverly they are crafted with the alluring aroma of bacon, which was a massive hit.

Price-wise, the chews work out slightly cheaper than the powder, particularly if you have a large dog.

photograph : smart bark

The third Buddy & Lola product we want to slip into this review is one for your dog First Aid kit.

Of course, the first thing to be said about Super Tummy Instant is that it's not a probiotic, Super Tummy Instant is a supercharged, veterinary-strength poop support for those times where you need instant results.

All dogs suffer with diarrhoea and upset tummies from time to time and Super Tummy Instant (as the name suggests) offers a short term solution which can then be followed up with their probiotic Super Tummy Daily on an ongoing basis.

For a full list of active ingredients in all their products and how they can help your dog, take a look at the Buddy & Lola website.

If you're interested in exploring more, why not take a look at our review - Buddy & Lola's Dog Supplements Review : Nourish Your Dog's Wellbeing

Our Verdict - With all-natural nutrients, approved by vets, a 30 day no fuss money-back guarantee, free delivery with orders over £30 plus a great value subscribe & save option including a free supplement storage tin, (take a breath) Buddy & Lola are definitely worth a closer look.

Form : Powder or Chews

Quantity: Powder - 120g | Chews - 60 (both will last a 10-18kg dog a month)

Reasons to Buy

+ Natural ingredients

+ Choice of powder or chews

+ Can be used in conjunction with Super Tummy Instant

Reasons to Avoid

- Exceptionally picky dogs may not like the chalky texture of the powder

Buying Options

Fancy trying Buddy & Lola ?

Enter discount code SMARTBARK15 for 15% OFF

(first time purchases only)

View Super Tummy Daily on Amazon

View Super Tummy Instant on Amazon

Our Verdict

In a nutshell, if your dog is dealing with gut or digestive issues, a quality probiotic supplement can be a great way to help ease those problems.

Each of the five probiotics we reviewed comes from reputable brands, packed with top-notch ingredients, and offers solid value for your money.

Plus, all of them provide a money-back guarantee, so you can try them risk-free.

Just keep in mind that probiotics usually take time to work so plan on giving them at least four weeks to see noticeable improvements. We'd recommend keeping a diary during this period as this can be a helpful way to track how your dog is responding.

FAQs

Is there anything I should look out for when I first add a probiotic to my dog's diet?

Like any dietary change, adding a probiotic supplement can occasionally cause a mild digestive upset. If necessary, stop the supplement, let the digestive system settle down and reintroduce again, starting at a very low amount and gradually building up to the label amount.

Is yogurt a prebiotic for dogs?

Yogurt is rich in calcium and protein and can act as a probiotic, which may benefit your dog’s digestive health by supporting good gut bacteria. If you choose to give your dog yogurt, opt for plain varieties without added sweeteners, as these are safer and healthier for dogs.

How long does it take for prebiotics to work in dogs?

Probiotics and prebiotics won't be an overnight cure for your dog's digestive problems. To rebuild the gut flora, the benefits of a balanced gut microbiome will take time. The products featured in our article will take a couple of weeks to a month of daily use before you can gauge if they're helping your dog.

We only review products we genuinely believe in. Most of the products featured in this article were sent to us at our request, allowing us to thoroughly test and evaluate their effectiveness.

We hope this review helps you find the perfect probiotic supplement for your dog.