The 8 Best Probiotics for Dogs in 2023

Best Overall

Purina Pro Plan Fortiflora Canine Probiotic Supplement

5

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Purina Fortiflora Canine Nutritional Supplement comes in pre-measured packets, making it easier to ensure that your dog is getting a daily dose of probiotics. Designed to be sprinkled over your dog’s food, Fortiflora is liver-flavored, making it irresistible to most dogs. The Purina probiotic supplement powder also provides vitamin E, protein, and antioxidants.

Fortiflora is meant in particular for puppies and adult dogs with diarrhea problems. It can also help reduce flatulence. According to Purina, Fortiflora uses a specific strain of Enterococcus faecium, a bacteria commonly found in human and animal digestive systems. Enterococcus has several cited advantages, including hardy growth that crowds out disease-causing bacteria like E. coli and its long history of reliable use in probiotic research.

Purina Fortiflora is sold in packs of 30, providing you with a month’s supply. A chewable version is also available.

Price at time of publish: $31

_{Formulation: Powder | Quantity: 30 sachets | CFUs: 100 million | Ingredients: Enterococcus faecium, L-ascorbyl-2-polyphosphate (source of vitamin C), brewer's dried yeast, vitamin E supplement, zinc proteinate, beta-carotene, salt, manganese proteinate, ferrous sulfate, copper proteinate, calcium iodate, sodium selenite}

Best Chews

NaturVet Advanced Probiotics & Enzymes Plus

4.8

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NaturVet’s Advanced Probiotics soft chews include Bacillus subtilis, a durable bacteria found in the digestive systems of cows and humans that may contribute to healthier gut flora. It also contains Bacillus coagulans, a probiotic approved for veterinary use by the U.S. Food and Drug Administration that's been demonstrated to improve nutrient digestibility (and is even used in the treatment of human digestive disorders like IBS).

But the NaturVet chews offer more than beneficial gut flora. They also incorporate supplemental stomach enzymes, including protease and cellulase, which aid in the breakdown of meat and vegetable materials in your dog’s food. It's a comprehensive approach to fortifying your dog's digestion as much as possible.

While many supplement makers can be frustratingly opaque, NaturVet is a subsidiary of Swedish pet healthcare company Swedencare and takes a number of steps to verify the quality of its supplements, including compliance with FDA Current Good Manufacturing Practice (CGMP) regulations, with regular third-party audits by U.L. Labs and certification from the National Animal Supplement Council.

NaturVet Advanced Probiotics are also available in powder form if you’d prefer to use it as a direct mealtime supplement.

Price at time of publish: $29

_{Formulation: Chews, but powder version also available | Quantity: 70-, 120-, and 240-count | CFUs: 100 million Bacillus coagulans, 1 billion Bacillus subtilis | Ingredients: Brewer’s yeast, glycerin, dried potato product, flaxseed, lecithin, canola oil, calcium sulfate, maltodextrin, tapioca starch}

Best Budget

Fera Pet Organics USDA Organic Probiotics with Prebiotics

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This vet-formulated scoop-and-serve, ultra-fine powder is packed with pre- and probiotics. You’ll find an impressively high number of strains; there are 12 different strains in total, which surpasses the number found in most pet probiotic products. The ingredients are certified USDA organic, third-party tested, and made in GMP-registered facilities.

You won’t find additives, fillers, or anything potentially iffy or synthetic in this product, either. The formula is tasteless, odorless, and colorless, making it extra simple to mix into your dog’s food undetected; for this reason, it’s a win for many pet parents who have picky eaters on their hands. In addition to supporting general gastrointestinal wellness, this product is formulated to help lessen bad breath and diarrhea.

This powder formula is safe for use in both dogs and cats, which offers additional savings and convenience to multi-pet households. It’s also shelf-stable, so you don’t have to clear room in the fridge or worry about it spoiling in the pantry.

The Fera Pet Organics powder is loaded with 12 strains of probiotics, with each scoop delivering 5 billion CFU.

Price at time of publish: $25

_{Formulation: Powder | Quantity: 2.5 ounce) | CFUs: 5 billion per scoop | Ingredients: FOS (fructooligosaccharides), organic inulin derived from agave, organic acacia, Lactobacillus acidophilus, Lactobacillus casei, Saccharomyces boulardii, Lactobacillus plantarum, Bifidobacterium infantis, Enterococcus faeciuim, Lactobacillus bulgaricus, Bifidobacterium bifidum, Bifidobacterium longum, Lactobacillus rhamnosus, Lactobacillus brevis}

Best for Older Dogs

Amazing Nutritionals Probiotic Joint Chewable Tablets

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As your dog ages, new problems may begin to pop up. Tackle any developing digestive dilemmas and ease joint pain with a probiotic for senior dogs, like Amazing Nutritionals Probiotics Joint Formula.

This supplement is for dogs who suffer from arthritis, joint pain, and stiffness. It omits many of the most common allergens for dogs, including wheat, corn, soy, egg, gluten, and more but includes 7 billion CFU of beneficial bacteria. In addition, your dog will get a dose of MSM, chondroitin, and glucosamine to ease any arthritis and support joint and cartilage health. It's also supplemented with stomach enzymes to bolster digestion.

Amazing Nutritionals Probiotics Joint Formula is made in the United States in a GMP organic-certified facility.

Price at time of publish: $30

_{Formulation: Chewable tablet | Quantity: 120 count | CFUs: 7.5 billion Lactobacillus acidophilus per chew | Ingredients: Amylase, lipase, protease (stomach enzymes), glucosamine sulfate, chondroitin sulfate, MSM methylsulfonylmethane, dicalcium phosphate, liver, stearic acid, whey, bacon flavor, magnesium stearate, silicon dioxide}

Best for Digestion

Zesty Paws Probiotic Bites with Natural Digestive Enzymes Chews

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If your dog is experiencing digestive distress or frequent tummy trouble, a probiotic with digestive enzymes may help to ease digestion and regulate elimination. Zesty Paws Probiotic Bites not only contain the probiotic load and supplemental stomach enzymes seen in several other products we recommend but also incorporate a more old-school doggy digestive aid: pumpkin. The high-fiber squash has long been recommended by veterinarians for digestive issues and forms the basis for these chews.

Each Zesty Paws chew has over 3 billion CFU of six different probiotic strains, which is equivalent to some prescription-strength probiotics. In addition to its primary pumpkin ingredient, Zesty Paws chews also incorporate papaya, which is high in folate and vitamin C. Together, these two additives may help your dog properly digest and eliminate food.

The one downside may be the taste. Some dogs scarf pumpkin, but others are indifferent. If your dog is uninterested, try crumbling up a chew and using it as a food topper instead.

Price at time of publish: $29

_{Formulation: Chewable | Quantity: 90-, 180-, 270-count | CFUs: 3 billion CFU per chew, including Bacillus subtilus, Lactobacillus acidophilus, and four other strains | Ingredients: Pumpkin, papaya, pea flour, palm fruit oil, garbanzo flour, tapioca flour, flaxseed meal, sunflower lecithin, natural vegetable flavoring, coconut glycerin, rosemary extract}

Best for Puppies

The Honest Kitchen Daily Boosters Instant Goat's Milk with Probiotics

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Support a healthy gut from an early age by introducing an easy-to-digest probiotic like The Honest Kitchen's Daily Boosters Instant Goat's Milk.

Each half tablespoon of Daily Booster goat milk contains 1.25 billion CFU of four different strains of healthy bacteria. The dehydrated supplement is made to human-grade food standards, using goat's milk from pasture-raised goats. Approved by the National Animal Supplement Council, The Honest Kitchen's probiotic powder doesn't use any preservatives, GMO ingredients, corn, wheat, or soy.

What makes this goat milk Daily Booster so useful for puppies is that it can be used as an easy food topper or provided as a hydrating bowl of liquid. Preparation is easy: Simply mix well with warm water. The probiotic milk is then ready to be poured over food, enhancing your active puppy's hydration.

The Honest Kitchen Daily Boosters are available in a dry powder jar or in single-serving packets. One downside for puppy owners is that the serving size is calibrated for a 25-pound dog, so you'll likely have to measure out a smaller serving for your puppy.

Price at time of publish: $17

_{Formulation: Powder, individual packets | Quantity: 5.2-ounce jar, 12-count single servings | CFUs: 1.25 billion CFU per chew, including Lactobacillus acidophilus, Lactobacillus casei, Lactobacillus rhamnosus, and Bacillus coagulans | Ingredients: Dehydrated goat's milk, dried Aspergillus oryzae fermentation product, dried Aspergillus niger product, dried Trichoderma reesei fermentation product, dried pineapple fermentation product}

Best Spray

FloraZil+ Multi-Probiotic Food Spray For Dogs

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If you’re looking for the simplest way to give your dog a daily dose of probiotics, a spray formula is hard to beat for convenience. The FloraZil+ Multi-Probiotic Food Spray is our choice for a probiotic spray that is easy to dispense while supplying beneficial bacteria for your pet.

This probiotic spray for dogs doesn’t need to be refrigerated, so store it in the place that is most convenient for you. Each milliliter of the liquid formula contains a minimum of 350,000 CFU of probiotics. The number of sprays in a single dose of the formula depends on the size of your dog, with smaller canines getting up to three sprays at a time and larger dogs getting anywhere from four to six sprays per meal.

If measuring or mixing a supplement into your dog’s meal isn’t compatible with your daily routine, then FloraZil+ Probiotic Spray for dogs is a simple solution to support your dog’s gut while keeping things easy.

Price at time of publish: $17

_{Formulation: Spray | Quantity: 6 ounces | CFUs: 350,000 CFU per spray | Ingredients: Water, liquid Lactobacillus plantarum fermentation product, liquid Enterococcus thermophilus fermentation product, liquid Lactobacillus casei fermentation product, liquid Bifidobacterium bifidum fermentation product, liquid Bifidobacterium animalis fermentation product, liquid Bacillus subtilis fermentation product, liquid Lactobacillus bulgaricus fermentation product, liquid Bifidobacterium longum fermentation product, active dry yeast, cane molasses, salt, natural flavor.}