Topping our list at number one is the dog food giant Purina with their Pro-Plan FortiFlora probiotic supplement for dogs. Naturally, this is perfect for dog owners who are following the Pro-Plan brand across the spectrum, but they are also the top probiotic brand prescribed by vets for dogs in America.

Available in a powder format, this probiotic for dogs goes down without the frown, as it can easily be added to their usual food without the fuss and hassle of trying to feed your pooch a pill. Made in the USA, this is the best probiotic for dogs you’ll find on the market as it’s easy to use, tasty to your dog and trusted by vets across the country.

Available at a great price, the Vetri-science Mega Probiotic for dogs and cats is a great option for multi-pet households as you can administer the supplements as part of all of your pets diets. Each tablet is guaranteed to host over 5 billion microorganisms and promises that these are sourced from 5 different, non-diary sources.

In other words, this is the perfect option for pets who are a little sensitive to dairy foods (particularly with cats, who are known for being lactose-intolerant). If your dog is known for being food sensitive or have allergies, then this is the best probiotic on the market for them.

Made in the USA and designed to be tantalizingly tasty to dogs, the Doggie Dailies option of probiotics for dogs makes it to the top three for being so easy to administer. These little treats go down without a fuss thanks to their appealing taste and chewy consistency.

More importantly, however, is the fact that this is the first option from our top picks to offer both probiotics and prebiotics in one. In other words, not only will your dog be able to consistently take care of their stomachs by munching on these chews, but they’ll also have the optimal environment in their digestive tract for growing healthy bacteria and fighting bad bacteria.

Taking great pride in their ability to contain over 22 different species of beneficial microbes is the powdered Pet Ultimates probiotics for dogs. Hugely popular and available with over 22billion CFU’s per scoop you can be sure that your dog’s stomach will be treated to a huge helping of beneficial bacteria with each dose.

Simply sprinkle over your dog’s food using the little scoop provided, to ensure a happy, healthy dog with guaranteed improved health. Yes, you heard right, Pet Ultimates are so sure of their product that they are willing to guarantee your dog’s health- that’s dedication to your (and your pups) happiness.

This huge tub of probiotics for dogs from NUSENTIA provides over 360 servings for your dog, and comes with over 360 billion CFU’s per tub- meaning you’ll be getting a lot of bang for your buck when using the NUSENTIA brand probiotics for dogs.

With well over 1,000 positive reviews, you can be sure that this is a tried-and-tested product that has been loved by dog owners for years. Made completely naturally with no rice, no maltodextrin, Gluten-Free, Non-GMO, Non Dairy, No Soy, No Fillers, No Flavorings, Odorless and no byproducts such as casein, this is perfect for dogs with allergies or sensitive stomachs.

Another chewy treat, although this time it’s from the masterminds at PetVitality Pro. Available with both pre and probiotics included in the production of the delicious chews, these little nuggets of doggy happiness come with naturally digested enzymes that work in harmony with your dog’s body to produce the optimum number of good bacteria that your dog needs.

Made with papaya, maqui berry and green superfoods, these dog treat also come with a moneyback guarantee, for your peace of mind. There are 60 treats per tub, all of which are made solely for dogs and, as such, come packed with the good stuff to make your pet a happy pup- so be sure to give them one a day and enjoy the difference in your dog.

These probiotic supplements from Amazing Nutritionals come in tablet format, so you may struggle to get the pickier pups to have a taste but this is still one of the most popular supplements available, today. This is all thanks to the 100% safe ingredients and amazing results which Amazing Nutritionals probiotics offer.

With no extras and no funny business, this is a probiotic that is made in the USA and kept to the highest standards. With over 120 tablets per tub, this is amazing value for money and the results certainly speak for themselves, so be sure to try a jar and, if you’re not happy, you can always receive your money back.

Nutramax may not have all the dazzle and sparkle that comes with some of the other options on our list but there’s no denying that, what it lacks in shine, it makes up for in effectiveness. These duel-wielding pre and probiotics from Nutramac contain the most beneficial bacterium without the hefty price tag- and they’re loved by reviewers too.

The biggest benefit to these supplements over others is that come in a sprinkle capsule format, meaning you have the choice of either feeding them to your dog via the capsule itself, or breaking it open and sprinkling the powder over their food- great for first-timers who need to know what their dog prefers.

As you may have guessed, Deley Naturals take pride in offering supplements which are made with 100% natural ingredients. These natural probiotics for dogs work wonder as they are perfect for those with sensitive stomachs while still packing a punch when it comes to helping your dog’s gut.

Another offering in a chewable format, these supplements are GMP compliant and even created within an FDA-inspected facility, so you can sure that your new probiotics are completely safe and very healthy, and all created with no artificial colors or flavors.

As one of our favorites, we couldn’t leave our list without including these probiotics from Zesty Paws. Created with dogs and dog owners in mind, these chewable treats are one of the most popular options available online- and created by one of the most highly-rated and consumer-loved companies in the dog food world.

You’ll get 90 chews per tub, and each chew is packed with Bacillus Coagulans to promote health digestion and encourage gut bacteria growth- all while tasting of pumpkin!