VetriScience Extra Strength Gut Mega Probiotic & Prebiotic Health Easy-Open Capsules Digestive Supplement for Dogs & Cats, 120 count

$16.00 First Time Autoship Price
this order
Save 50% (up to $20) today when you set up Autoship. 

$30.40 Autoship Price
(-5%) future orders
  • Keep saving 5% on every order
  • Get deliveries on your schedule
  • Skip, change, or cancel anytime
$32.00 Chewy Price
($0.27 /ea)
Save $40.32 (-56%)
$72.32 List Price
Promo, Spend $100, Get $30 eGift Card with code STOCKUP
Promo, New Customers Only: Spend $49+, get $20 eGift Card + free shipping with code WELCOME

In Stock
FREE 1-3 day delivery on first-time orders over $35
Free 365-day returns

No Interest if paid in full in 6 months on PayPal purchases of $149+. .

About This Item

Details

  • Helps maintain normal stool quality and supports overall digestive comfort for cats and dogs of all sizes.
  • Probiotics work best when given consistently, and these capsules make it easy to support your pet’s digestive health every day.
  • Multi‑strain probiotic and prebiotic formula contains beneficial probiotic strains plus prebiotics to help support gut flora, nutrient absorption, and immune health.
  • Formulated with veterinary expertise and backed by VetriScience’s commitment to quality, safety, and effectiveness.
  • Capsules can be given whole or opened and mixed with food for easy daily supplementation, so they’re great for sensitive stomachs.

Ingredient Information

Instructions

FAQ

Learn More About VetriScience From Our Team of Experts
VetriScience presents the message, “Unleash What’s Possible.” No additional product details, benefits, ingredients, certifications, or formula claims are provided in this module.
VetriScience gut health products are presented for dogs and cats, with support themes including digestive support, gut balance, and immune health. The product lineup includes Vetri Mega Probiotic, Probiotic Everyday, Entero Flora Pro, and Gut Health, with claims such as vet formulated, veterinary strength, extra strength, probiotic everyday, and new look, same great formula. Visible product details include FOS Fructooligosaccharides prebiotic fiber 100 mg, prebiotics and probiotics, 7 probiotic strains, daily use, and options for all dogs and cats, dogs of all sizes, and all cats.
This section focuses on signs of poor gut health. It explains that an unhealthy gut can affect more than digestion and encourages pet owners to watch for signs that their pet may be out of balance.
VetriScience gut health supplements are described as targeted probiotic support, with a healthy digestive system presented as the foundation of overall wellness for pets. The signs called out include loose stools, digestive upset, and excessive gas. The stated support areas include promoting digestive balance, supporting immune health, and providing gut and bowel support.
VetriScience probiotics are described as an easy way to support a pet’s digestive health at all life stages. The formulas offer powerful levels of active ingredients and billions of CFUs per average serving to support healthy digestion and gut balance. Additional claims include easy daily and targeted digestive support, plus multiple formats for every pet’s preference.
VetriScience gut health formulas are veterinarian-formulated with clinically studied ingredients. Fructooligosaccharides FOS is described as a prebiotic fiber that nourishes beneficial bacteria in the gut, while Bacillus coagulans is described as a resilient, spore-forming probiotic that survives the digestive process. Bifidobacterium longum is described as a probiotic strain that helps maintain a balanced intestinal microbiome.
VetriScience presents condition-specific support backed by science with gut health products for dogs and cats. The lineup includes Vetri Mega Probiotic for gut health with prebiotics and 7 probiotic strains, Probiotic Everyday with FOS Fructooligosaccharides prebiotic fiber 100 mg, Entero Flora Pro for veterinary strength gut health, and Gut Health with prebiotics and probiotics. Visible claims include vet formulated, probiotic everyday, extra strength, formulated for daily use, new look same great formula, and options for all dogs and cats, dogs of all sizes, and all cats.

See More from VetriScience!

Shop Here

Questions & Answers

39 Customer Questions


how many probiotics are in one capsule not a gram?


Would 6lb dogs take 1/2 a capsule?


does this help cats breath?


I understand dog's guts need different bacteria than human guts. Are the bacteria in this product specific for dogs?


4.6
Rated 4.6 out of 5 stars
776 Ratings

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Digestive Support

91% Positive

Potency

85% Positive

Probiotic Strains

90% Positive

Quality and Purity

90% Positive

436 Customer Reviews



Rated 5 out of 5 stars
Verified Purchase
By Dozer16 on Jun 27, 2017

This Probiotic is excellent

My dog has serious IBS and needed a good full spectrum Probiotic to help his stomach issues. This one works great along with Mercola Digestive Enzymes that I also

My dog has serious IBS and needed a good full spectrum Probiotic to help his stomach issues. This one works great along with Mercola Digestive Enzymes that I also get from Chewy's. This site is awesome and I get all my pet supplies from here. The customer service is great and their prices are the best online and cheaper than the vet office. Everything arrives within two day, three at the very most.


Rated 3 out of 5 stars
Verified Purchase
By Susan on May 26, 2025

not as effective as I'd like

I have 15 and 25 lb dogs and they often get loose or runny stools on their diet of rice/grain mixtures, spring greens and chicken or eggs. I've seen their stool

I have 15 and 25 lb dogs and they often get loose or runny stools on their diet of rice/grain mixtures, spring greens and chicken or eggs. I've seen their stool become more solid when I give them human probiotics but mine are expensive and not the same species as those in dogs'. So I've been looking for the list of probiotics that contain the species that are in dogs.. but just because they are listed doesn't mean they are actually in there and that they are alive and working. These seemed to help my dog get better stool texture and increase appetite for my dogs only sometimes and when I gave 2 to my 25 lb dog. So I would say for every 15 lbs, they need one capsule. Considering the dosage, these are expensive and they don't work as well as Herb Smith Microflora. I need to compare prices now for what I get with Herb Smith.


Rated 5 out of 5 stars
Verified Purchase
By Sharon on Jan 25, 2015

Helped my 12 year old dog!

Ronin, my standard Min Pin, has had tummy issues his entire life. As he's gotten older they have increased. I noticed a difference in his reflux, gas, etc.. within

Ronin, my standard Min Pin, has had tummy issues his entire life. As he's gotten older they have increased. I noticed a difference in his reflux, gas, etc.. within a day of using this product! There were times when he would even refuse to eat due to his stomach issues. Thankful I found it! With his size being under 40lbs it is also just one a day. I put it in a bit of peanut butter and he never notices!


Rated 5 out of 5 stars
Verified Purchase
By Annie on Feb 8, 2017

VetriScience Vetra-Mega Probiotic

I raise purebred show cats; most everyone knows that purebreds have very delicate digestive and immune systems. My kids are no exception. I have been running myself

I raise purebred show cats; most everyone knows that purebreds have very delicate digestive and immune systems. My kids are no exception. I have been running myself ragged trying to find a resolution to chronic diarrhea. My vet, of course, wants to do hundreds of dollars worth of tests. Usually, these tests result in no definitive answer. I tend to lean toward the holistic approach with my kids. Several weeks ago, I started my kids on diatomaceous earth, which gave me 'okay' results, but 'okay' results for me were not good enough. When I found this probiotic on Chewy, I knew I had found the rest of the equation. Whenever the Flora in the gut is changed, whether that be a good change or bad change, the digestion process changes. So in the beginning, during the first few days I was not surprised to see that diarrhea had returned. But after about a week of being on this probiotic, I was beginning to see a good change. My kids have been on this probiotic for about 2 weeks now, and scooping their boxes is always a pleasant surprise. The addition of this probiotic has changed cow patties into nice, perfect tootsie rolls. As a professional breeder, I highly recommend the addition of this probiotic to your furkids diet. Even if diarrhea is not an issue, this probiotic will strengthen their immune system, making them happier and healthier. And that's the true reward.


Rated 5 out of 5 stars
Verified Purchase
By jo on Apr 18, 2016
Top 100 Contributor

Good probiotics

In my search for a good probiotic to give my dog, I decided on these, she has done very well with these in the treat form. A few months ago I looked every where

In my search for a good probiotic to give my dog, I decided on these, she has done very well with these in the treat form. A few months ago I looked every where and could not find the treat form, every place was out. I eventually did find some and ordered them a few days later I received a phone call saying they were out and they offered to send me a different kind that supposedly had the same ingredients. I received the new kind and started noticing some very loose stool. Aw oh, I should have checked the ingredients all was fine except they contained dairy, my dog does not do well with dairy. So I quickly ordered these and started mixing them in with a little canned food, things are almost back to normal. This is the second time I placed an order from that other place and the second time that I have waited for over a month for a refund of some sort this time because that other antibiotic was cheaper. I had to write customer service both times and ask about the $ owed to me. Just one more reason to always stick with chewy!


Rated 4 out of 5 stars
Verified Purchase
By Emily on Nov 7, 2019

Her poop...looks better?

Not exactly something I planned on writing but it’s true. It’s also not why I bought the product. She’s always been regular and her poop has always been normal,

Not exactly something I planned on writing but it’s true. It’s also not why I bought the product. She’s always been regular and her poop has always been normal, except for the one time in puppyhood when she ate 13 fermented plums from under a plum tree and had the runs for days. It was almost comical. I don’t know how to describe what this has done to her poop except to say that it’s picture perfect magazine worthy poop because of this stuff. Anyway, I bought it as part of my “kitchen sink” plan for helping my golden retriever deal with an aggressive bout of seasonal allergies. Research has suggested that gut health in canines is tied to the immune system’s response to allergens and not just to food allergens. Healthy gut = less extreme response. These were affordable, had good reviews, and the company provides reasons for why they chose the bacteria species that they did. I have no way of knowing if this has impacted my dog’s allergies since it is one of many products I’m giving her. Do I care that I won’t know exactly what helped her seasonal allergies? Nope. I’m just glad she’s less itchy. Will I reorder? Maybe.


Rated 5 out of 5 stars
Verified Purchase
By some1 on Sep 21, 2019

These Work So Well, I'm Amazed!!!

I bought these for my GSD, hoping it would help his severe chicken/egg allergy, and his constant runny poos. I also started giving some to our Chihuahua and old

I bought these for my GSD, hoping it would help his severe chicken/egg allergy, and his constant runny poos. I also started giving some to our Chihuahua and old cat. Within a week, the cat's white fur had become so much more white, it's almost bright enough to emit its own light. She is a long hair breed, and we had been having trouble with her hair falling out in clumps lately, and just making a huge hairy mess around the house. But now, she doesn't lose hair anymore! This is the first time in her life that we can pet her without having a hand full of fur afterwards. Her eyes are much brighter than they have been in the past 3 years, and she seems genuinely happier. I'm simply amazed, and feel guilty for not knowing she needed these sooner. The Chihuahua doesn't get this as often, but I can tell her fur is a little bit softer than usual with her minimal dosing. The German Shepherd mix took a little bit longer to see results, but he is a big boy, so that's fair. Because of his size/severity of issues, I started him on a double dose. It's been about a month now, and his movements are all solid (first time in almost 2 years), and he seems to have more energy. I have started giving him small treats that contain chicken, and he seems to be ok! I will still give these to him for a while longer before adding chicken to his meals, but I have high hopes with the progress we've made so far! He has been allergic to chicken/eggs his entire life, and often gets an upset tummy being around other dogs who have eaten chicken, so this product is a blessing! I just open the capsules over his food and blend it in so he doesn't think it's anything weird sitting on top. It took him a while to eat it willingly (he heard me call it medicine once, opps), but now he knows it's good stuff. I'm already showing it to all my friends so they can buy it for their own pets. I truly believe this is a product that every pet owner needs to buy, at least once in a while. If your pet is getting old, I recommend feeding them this every single day.


Rated 4 out of 5 stars
Verified Purchase
By Tammi on Jun 7, 2018

Results: thumbs up

Although, its not the BEST product on the market, it IS a great product for the price! I have two big dogs (160# plus), of four, that is prone to IBS, and this product

Although, its not the BEST product on the market, it IS a great product for the price! I have two big dogs (160# plus), of four, that is prone to IBS, and this product works great, in conjuction with other supplements I give, to help the GI tract. Do your research people! :)


Rated 5 out of 5 stars
By Pamela on Aug 31, 2017

No more throw-up

We purchased this when we noticed our 14 year old cat was having a hard time keeping food down. We also changed her food to a different protein, thinking she may

We purchased this when we noticed our 14 year old cat was having a hard time keeping food down. We also changed her food to a different protein, thinking she may have developed a food allergy. This cleared up her issues and we had stopped giving her the probiotic after some time. We noticed that she would still regurgitate either food or saliva, after eating, maybe 1-2 times a week, in small amounts. Fast-forward to this past week and she somehow got out of the house. She returned after being outside for two nights. The first time she ate, she threw up all of her food almost right away. We decided to start her back on this product. After giving it to her just one time, she kept her food down. We've continued to give it to her once daily. We've noticed that she is not throwing up at all, not even the occasional bits of saliva we would find at times. She will even wait for us to sprinkle this on her food before eating. She seems to like it.


Rated 4 out of 5 stars
Verified Purchase
By Carolyn on Oct 5, 2017

Great Probiotic!

I originally bought this probiotic for my senior Sheltie, who has always had digestive issues. I swear she's got acid reflux. I changed her food to homemade, which

I originally bought this probiotic for my senior Sheltie, who has always had digestive issues. I swear she's got acid reflux. I changed her food to homemade, which definitely helped, and eventually cut out gluten, which actually helped her sleep so much more soundly at night. But, I still added this probiotic to her food. I give her one capsule a day, 1/2 in the morning, half at night. I find adding it to her two meals each day helps keep her stools normal sized and not so much gagging/retching. Then, my cat got diagnosed with renal failure. At 16, he had been fading fast and not wanting to eat, and it took me way too long to realize it. I changed his food to a kidney cat brand and added this probiotic into his diet pretty quickly after his diagnosis. It worked wonders. No more massive hairballs, and more importantly, he wasn't throwing up his food anymore. Knock on wood, at 19, he's still eating like a champ, with healthy bowel movements and still no vomiting. Soon after he started the probiotic, he took such a big poop, I could've sworn the dog got into the litter box! I'm actually buying another bottle to stock up. I use about 1/8 tsp a day and mix it into his wet food (I measured 1/8 tsp was approximately half a capsule, as the bottle recommended for felines), and it doesn't bother him at all. It is powdery, so I tend to open a few capsules at once in a small Rubbermaid and scoop from there. Not all that tidy, but hey, it works and he's feeling great. I would recommend this. I have tried other brands in the past and I keep coming back to Vetriscience.