15 Best Probiotics For Dogs 2025: Vet-Recommened Picks (For Every Need)

best probiotics for dogs

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A dog’s health begins in the gut. Beneath the wagging tails and playful barks lies a complex microbiome—a bustling community of bacteria that can bolster your dog’s vitality or leave them struggling with digestion, allergies, or chronic discomfort. Probiotics are the key to tipping the scales toward optimal health, but not all probiotics are created equal. How do you discern what will truly benefit your dog in a crowded market of supplements promising miraculous results? Is it about specific strains? Formulation? Or is it simply a matter of trial and error? As pet owners increasingly turn to probiotics to address everything from upset stomachs to itchy skin, the demand for clarity has never been greater. This guide reviews the best probiotics for dog brands that stand out as the best in their class.

Best Probiotics For Dogs A At Glance

What Are Probiotics For Dogs?

Probiotics are supplements containing live, beneficial bacteria (probiotic strains) that boost health when consumed adequately. These bacteria naturally inhabit your dog’s digestive tract and other regions. There are many different types of probiotic strains. Two of the most common probiotic bacteria strains are Bifidobacterium and Lactobacillus. The best probiotics for dogs usually contain a combination of multiple strains. Probiotic supplements for dogs are commercially produced probiotic formulas found in powders, chews, capsules, pastes, liquids, or food.

The Role of Probiotics In Dogs

Like humans, your dog’s body is home to good and bad bacteria. Bad bacteria, often in the form of germs or pathogenic strains, can cause diseases, infections, and even serious illness. Occasionally, this delicate bacterial balance can be disrupted, allowing harmful bacteria to overpower beneficial ones. This imbalance can impair your dog’s ability to digest food properly, leading to digestive issues and other health problems. Probiotics help restore and maintain this balance by supporting good bacteria, preventing gastrointestinal (GI) issues, and strengthening the immune system, especially after disruptions caused by illness, infection, antibiotic use, or other stressors.

Canine probiotics are designed to nourish and promote the growth of good bacteria in your dog. They can promote healthy gut flora, decrease diarrhea incidents, improve food allergies, promote better skin and coat and more. To learn more about their benefits, read out the Probiotics for Dogs guide for the latest research and critical information you need to know about probiotics.

How To Pick The Best Probiotics For Your Dog

Multiple bacteria strains Different strains of bacteria provide additional benefits to your dog. Studies have shown that multi-strain probiotics are more effective than single-strain probiotics. For instance, Bifidobacterium and Lactobacillus aid with diarrhea and gut health.
Packaging and shelf stability Look for brands that provide protective shields for their probiotics, so more bacteria reach your pet’s intestines intact. Consider opting for single-use packaging.
Probiotics Opt for a probiotic formula that includes a prebiotic. Prebiotics support probiotic growth and propagation, which is vital in controlling harmful bacteria.
Potency and CFU Most dog probiotic supplements come in CFUs ranging from 1 billion to 10 billion per serving. The higher the CFUs, the more amount of bacteria and potency.
Living bacteria Sometimes,, when you buy a probiotic, some of the bacteria in the product die. Look for a probiotic that guarantees CFU at expiry to get at least the amount of bacteria promised on the label.
Allergen-free Avoid probiotics that contain allergens like dairy, fish, bovine, crustaceans, soy, and wheat.

Best Probiotics For Dogs Reviews

What is the best probiotic for dogs? We’ve rounded up the best probiotic dog brands your dog will love. Our team of experts rated the best probiotic dog biscuits based on ingredients, customer reviews, product tests, price, and other factors.

Selecting the best dog probiotic depends on the strains your dog’s body needs, probiotic quantity, health condition, and other factors. Always consult your vet before giving your pup any medications or supplements. 

Best Overall Dog Probiotic

4.9

Nom Nom

Who It’s For: Dog owners seeking a high-quality, well-rounded probiotic suitable for all breeds and sizes, offering proven health benefits.

Probiotics strains: 7

CFU: 20 billion per serving

Prebiotic included: Yes 

Servings: 30 per container 

Manufactured: USA

Why we recommended it: Nom Nom is a well-known, reputable dog food delivery service in the United States. They won the best overall dog probiotic medal because their product is formulated by veterinary nutrition and microbiology experts using top-quality ingredients at FDA-registered facilities under GMP guidelines. Each batch is independently tested for product integrity. It’s appropriate for all breeds, including puppies (older than eight weeks) and adults. To serve, mix one scoop serving into your dog’s food once daily. After use, reseal and protect from light, high temperatures, and moisture. Nom Nom recommends refrigeration for optimal preservation. Their veterinary nutrition and microbiology team expertly formulate them.

What sets it apart from competitors: It’s boosted with prebiotic fiber for added beneficial bacteria development.

Probiotics strains: Lactobacillus reuteri, Pediococcus acidilactici, Enterococcus faecium, Lactobacillus acidophilus, Bifidobacterium animalis, Lactobacillus fermentum, and Lactobacillus rhamnosus.

Pros

  • Free shipping
  • Discount on every order for Nom Nom fresh food subscribers
  • Great for dogs on antibiotics

Cons

  • A bit more expensive
  • No money-back guarantee

Best Dog Chew Probiotic 

4.7

Ollie Probiotic Chews

Who It’s For: Pet parents who prefer a convenient, tasty, chewable probiotic for dogs that dislike powders or capsules.

Probiotics strains: 5

CFU: 1 billion per serving

Prebiotic included: Yes 

Servings: 60 per container 

Manufactured: USA

Why we recommended it: Ollie Dog Probiotic Chews are scientifically formulated using five strains of probiotics to help improve digestion and promote gut health in dogs. Veterinarians recommend them for having a balanced and pleasant formula for your furry friend. We love that they boost their probiotic formula with all-natural digestive system soothing ingredients in these chews including pumpkin seed and papaya leaf powder.

What sets it apart from competitors: It is made using a cold extrusion process to preserve the potency of every active ingredient.

Probiotics strains: Enterococcus faecium, Lactobacillus, Acidophilus, Lactobacillus casei, Lactococcus, Lactis, Lactobacillus reuteri

Pros

  • For any breed
  • Distinct duck flavor (suitable for vegetarian diets)
  • All-natural

Cons

  • A subscription is required for dog food but also sold on Amazon

Best Organic Probiotic For Dogs

4.8

Open Farm

Who It’s For: Environmentally conscious dog owners looking for certified organic probiotics made from sustainable and high-quality ingredients.

Probiotics strains: 7

CFU: 2 billion per serving

Prebiotic included: Yes 

Servings: 90 chews per jar 

Manufactured: USA

Why we recommended it: Open Farm is a pet food company that offers a range of dog products, including probiotics. They go to great lengths to source clean and organic ingredients to formulate their probiotics. These probiotics are vet-approved and developed as a part of their commitment to ethical and transparent sourcing practices. You can trace the origin of every ingredient in Open Farm probiotics on their website. Each Probiotic soft chew was made to help support normal gut flora and bowel movement to promote healthy digestion and gut health.

What sets it apart from competitors: Open Farm is one of the most sustainable dog food brands. It has partnered with How2Recycle to ensure that its probiotic jars are 100% recyclable and not end up in landfills.

Probiotics strains: Lactobacillus acidophilus, Lactobacillus casei, Lactobacillus fermentum, Lactobacillus reuteri, Lactobacillus plantarum, Bifidobacterium bifidum and Bacillus coagulans.

Pros

  • Made with Pumpkin for fiber and helps support digestive health
  • Plant-based ingredients
  • 100% traceable ingredients
  • Human-grade ingredients

Cons

  • One flavor

Best Probiotic For Puppies 

4.6

Honest Kitchen Instant Goat’s Milk

Who It’s For: Owners of young puppies need a gentle probiotic formula tailored to support early development and digestion.

Probiotics strains: 5

CFU: 5 billion per serving

Prebiotic included: No 

Servings: 30 per jar 

Manufactured: USA

Why we recommended it: Taking care of your dog’s gut health from an early age is essential. A puppy probiotic can help keep your puppy’s tummy happy and healthy. Whether you are looking for a probiotic for puppy diarrhea or want to support their digestion, immune systems, and well-being, The Honest Kitchen Instant Probiotic Goat’s Milk for dogs is a great choice. This probiotic powder supplement for puppies can be served as a nourishing drink by adding water or sprinkled over dry or dehydrated kibble. It’s ideal for rehabilitation, digestive issues, and general immune support at the gut level for growing puppies. Serve over kibble, hydrate Honest Kitchen food, or offer it alone as a human-grade nightcap.

What sets it apart from competitors: It is made from highly digestible dehydrated goat’s milk from pasture-raised, free-ranging goats in the Pacific Northwest and digestive enzymes. Goat’s milk is especially great for puppies and kittens, as it helps support their digestion, immune systems, and well-being.

Probiotics strains: Lactobacillus case, Lactobacillus acidophilus, Lactobacillus bulgaricus, Bifidobacterium longum, and E. thermopilus.

Pros

  • Human-grade
  • No by-products, preservatives, or GMO ingredients.

Cons

  • One flavor

Cheapest Probiotic For Dogs

4.7

Nusentia Dog Miracle

Who It’s For: Budget-conscious dog owners seeking an effective and affordable probiotic option without compromising on quality.

Probiotics strains: 6

CFU: 1 billion per serving

Prebiotic included: Yes 

Servings: 360 scoops per jar 

Manufactured: USA

Why we recommended it: Looking for the cheapest dog probiotic that doesn’t sacrifice quality, Nusentia Dog Miracle Probiotic is our top choice cheapest probiotic for dogs. It offers excellent value for large dogs, individuals with multiple pets, or providing various servings per day. Nusentia offers the best quantity for your buck, with over 360 scoops per jar. Perfect for combatting dog diarrhea, loose stool, yeast overgrowth, gas, bad breath, constipation, skin issues (itching & scratching), allergies, digestive issues, boost immune health, and gut-related problems in pets.

What sets it apart from competitors: With over 360 billion CFUs of probiotics per jar (or 1 billion per scoop), this brand is confident in the effectiveness of its formula and offers a 60-day 100% money-back guarantee. Includs Inulin, a prebiotic.

Probiotics strains: Bifidobacterium animalis lactis, Lactobacillus acidophilus, Lactobacillus rhamnosus, Lactobacillus salivarius, Lactobacillus plantarum, Lactobacillus reuteri, and Stearic acid.

Pros

  • Gluten-free, non-GMO
  • No dairy, rice, soy, or fillers
  • No by-products or fillers
  • Tasteless and odorless
  • Made in the USA at GMP, FDA certified facility

Cons

  • Can get lumpy

Best For Gut & Digestion

4.4

Pawfy

Who It’s For: Dog owners focused on improving their pet’s digestive health or addressing specific gut-related issues like diarrhea or gas.

Probiotics strains: 5

CFU: 2 billion per serving

Prebiotic included: No 

Servings: 30 chews per jar 

Manufactured: USA

Why we recommended it: Are you looking to maintain a healthy digestive system in your dog? Pawfy probiotics are a great addition to aid with better gut health. Pawfy dog probiotics can improve a dog’s gut health and digestive functioning thanks to its research-based formula. And because it’s jam-packed with natural ingredients (i.e., organic turmeric) and a perfect balance of vitamins A, D3, E, C, B1, B6, B2, and B12 for overall health, it helps boost the immune system and function and increases energy and overall physical well-being. These daily multivitamins and probiotic chews promote overall well-being and health. It has a tasty chicken probiotic flavor can freshen your dog’s breath and maintain healthy bacteria.

What sets it apart from competitors: Additionally, it delivers pantothenic acid, manganese, folic acid, and biotin to support healthy anatomy and overall well-being.

Probiotics strains: Lactobacillus acidophilus, Lactobacillus plantarum, Lactobacillus brevis, Lactobacillus fermentum, and Lactococcus lactis.

Pros

  • Vegetarian
  • Satisfaction guaranteed
  • Locally sourced ingredients
  • Natural ingredients

Cons

  • One flavor

4.6

Finn

Who It’s For: Dog parents looking for a vet-recommended probiotic with a seal of trust for safety and effectiveness.

Probiotics strains: 6

CFU: 3 billion per chew

Prebiotic included: Yes 

Servings: 90 chews per jar 

Manufactured: USA

Why we recommended it: Finn Digestive Dog Probiotics win the best vet pick spot because they work hand-in-hand with top-notch veterinarians and canine nutritionists to create the best possible probiotic with the best possible ingredients. The Pumpkin, Inulin, and FOS found in Finn help ‘good’ bacteria flourish and stay nourished.

What sets it apart from competitors: Added prebiotics provide food and fuel to probiotics, helping keep them healthy and active. The result is better digestion, enhanced nutrient absorption, improved immune function, and a healthier, happier pup.

Probiotics strains: Lactobacillus acidophilus, Lactobacillus fermentum, Lactobacillusreuteri, Lactobacillus plantarum, Bacillus bifidum and Lactobacillus casei.

Pros

  • Tested and approved by a vet
  • No GMO
  • NACS certified

Cons

  • One flavor

Best Probiotics For Small Dogs

4.6

Pawlife

Who It’s For: Owners of small breeds requiring a probiotic specially designed for their smaller size and nutritional needs.

Probiotics strains: 5

CFU: 2 billion per chew

Prebiotic included: Yes 

Servings: 120 chews per jar 

Manufactured: USA

Why we recommended it: Are probiotics good for small dogs? Yes, probiotics work on any dog size just as well. If you have a small dog breed suffering from an upset stomach, diarrhea, gas or are looking for the best probiotics for small dogs, Pawlife Soft Chews Probiotics for Dogs 3-in-1 formula is an excellent choice for small dogs. The 2 billion CFUs per chew is perfect for a small dog’s digestive system. Pro Pup promotes a balanced GI tract to support gas, bloating, constipation, diarrhea, indigestion, gut PH levels, and overall stomach discomfort. How much probiotics can I give a small dog? One soft chew per 25 lbs of body weight should work great for your pup. You can break the treat in half if your dog weighs less than 25 lbs.

What sets it apart from competitors: The soft texture of these mouth-watering, chicken-flavored soft chews is easy on small dogs’ teeth. Each soft chew is smaller than a nickel, perfect for a small dog’s mouth.

Probiotics strains: Lactobacillus acidophilus, Lactobacillus plantarum, Lactobacillus brevis, Lactobacillus fermentum, and Lactococcus lactis.

Pros

  • Tested and approved by a vet
  • No GMO
  • NACS certified

Cons

  • One flavor

Best Probiotics Capsules For Dogs

4.5

 Nutramax

Who It’s For: Pet parents who prefer a capsule probiotic for precise dosage control and potent formulations.

Probiotics strains: 7

CFU: 5 billion per chew

Prebiotic included: Yes 

Servings: 80 capsules per box 

Manufactured: USA

Why we recommended it: If you are looking for the best dog probiotic pills, Nutramax Proviable-DC Health Supplement for Cats and Dogs is a multi-strain probiotic supplement that supports a healthy intestinal balance in dogs. Each Proviable-DC probiotic capsule can help maintain intestinal balance during times of dietary indiscretion, dietary change, food sensitivities, loose stool, stress induced by travel or kenneling, weaning of puppies and kittens, metabolic disturbances, immune system-related gastrointestinal conditions, and other related issues. Whether your dog has a temporary case of an upset stomach from boarding stress, antibiotics, or just having a sensitive system, proviable probiotic capsules help put things back in balance. You can use this capsule in conjunction with a dog probiotic paste for extra support and effectiveness.

What sets it apart from competitors: It’s boosted with two prebiotics, which support the probiotics’ growth within the intestinal tract and help them compete against the harmful bacteria that colonize the intestines. The box comes with 80 capsules, enough to last up to three months.

Probiotics strains: Enterococcus faecium,  Bifidobacterium bifidum, Enterococcus thermophilus, Lactobacillus acidophilus, Lactobacillus bulgaricus, Lactobacillus casei, and Lactobacillus plantarum.

Pros

  • Supports gastrointestinal health in dogs
  • Reestablishes intestinal microflora health
  • Easy to administer
  • Great for long-term intestinal health support and balance
  • 6 published studies

Cons

  • Dogs may not like capsules, so you may need a pill pock like Greenies to hide it and feed i

Best Probiotics Paste For Dogs

4.4

PETAG Bene-Bac

Who It’s For: Dog owners who need an easy-to-apply paste probiotic for picky eaters or pets recovering from illness.

Probiotics strains: 7

CFU: 5 billion per chew

Prebiotic included: Yes 

Servings: 80 capsules per box 

Manufactured: USA

Why we recommended it: Bene-Bac Plus Probiotic Pet Gel is one of the most reputable probiotic supplements on the market. It’s made from 7 different bacterial strains that help crowd out bad bacteria, improve your dog’s appetite, and provide quick energy. Every Bene-Bac Pet Gel multidose syringe contains 15 grams of gel concentration of live-culture probiotic digestive bacteria. Each gram offers a guaranteed 20 million colony-forming units (CFU). Although this doesn’t seem like as many CFUs per serving, most customers have found the product very effective.

What sets it apart from competitors: Bene-Bac probiotics are fat-encapsulated to ensure maximum probiotic survival through the stomach acids of the digestive tract to reach the intestines. Its easy-to-use dial-a-dose syringe gives the indicated dose, making it easy to feed in any situation.

Probiotics strains: Enterococcus faecium,  Bifidobacterium bifidum, Enterococcus thermophilus, Lactobacillus acidophilus, Lactobacillus bulgaricus, Lactobacillus casei, Lactobacillus plantarum.

Another probiotic paste alternative is FullBucket Dog Probiotic Paste. Its highly concentrated yeast-based formula supports natural gut defenses during periods of stress. It has 12.5 Billion CFU’s of Saccharmoyces cerevisae boulardii per serving. Prebiotics, digestive enzymes, and L-glutamine are also included in this formula. It’s the ideal probiotic paste for dogs on antibiotics.

Pros

  • Easy administration
  • Dial-a-dose mechanism
  • 1-year date code guarantee
  • 1 gram travel tube for on-the-go treatment

Cons

  • Not as much quantity for the price
  • Gel options can get messy

Best Probiotics Spray For Dogs

4.7

Florazil

Who It’s For: Busy dog parents looking for a probiotic spray that’s quick to apply and easy to use with any food.

Probiotics strains: 8

CFU: 750K per ml of liquid

Prebiotic included: Yes 

Servings: 6 ounces 

Manufactured: USA

Why we recommended it: Try Florazil+ Multi-Probiotic Food Spray for Dogs, our top pick for the best probiotic spray. It contains an assortment of probiotics that work to aid your dog’s digestive process. It comes in an easy-to-use bottle with 6 ounces of spray. The spray can be applied directly to your dog’s food, making administration a breeze. No refrigeration is necessary, so store it in the place that is most convenient for you. These probiotics are microorganisms beneficial to your dog’s digestive tract, meaning this spray is all-natural. These microorganisms work by enhancing the good bacteria that are already present in the dog’s digestive tract.

What sets it apart from competitors: Enhance palatability for any type of food

Probiotics strains: Liquid Lactobacillus plantrum, liquid Enterococcus thermophilus, liquid Lactobacillus casei, liquid Bifidobacterium bifidum, liquid Bifidobacterium, Liquid Bacillus subtilis, liquid Lactobacillus bulgaricus, and liquid Bifidobacterium longum.

Pros

  • No need to refrigerate

Cons

  • CFU count is lower than other products reviewed here (750K CF

Best Liquid Probiotic For Dogs

4.5

MaryRuth’s

Who It’s For: Pet owners seeking a liquid probiotic that is easy to administer, especially dogs with dietary restrictions.

Probiotics strains: 4

CFU: 750K per ml of liquid

Prebiotic included: Yes 

Servings: 160 servings/bottle 

Manufactured: USA

Why we recommended it: Mary Ruth’s USDA Certified dog organic liquid probiotic wins our pick for this category. This company includes a proprietary blend (plant-derived & Non-GMO) of probiotic strains. This blend is mixed in an enzyme-enriched substrate with water and a proprietary combination of 3 organic types of grass. Liquid dog probiotics are easily absorbed, unlike solid probiotics, which are treated with heat and chemicals. Liquid probiotics are always in their raw state, ensuring shelf stability and maximum potency. This product is human-grade quality, and the strains were explicitly chosen to support dogs’ health. You can add it to your dog’s food or serve it directly into their mouth. Customers report success giving it to their dog now, but you should try whatever works best for you and your dog.

What sets it apart from competitors: No refrigeration is required, and you can store it in a cool, dry place.

Probiotics strains: Lactobacillus acidophilus, Lactobacillus casei, Bifidobacterium lactis, and B. breve.

Pros

  • Vegan
  • Non-GMO
  • Gluten-free
  • USDA organic probiotic

Cons

  • The bottle must be handled carefully as it can break if dropped

Best Probiotic Powder For Dogs

4.7

Honest Paws

Who It’s For: Dog owners preferring a versatile powdered probiotic to mix into meals for seamless feeding.

Probiotics strains: 5

CFU: 5 Billion per stick

Prebiotic included: Yes 

Servings: 30 sticks per bag 

Manufactured: USA

Why we recommended it: Honest Paws (a top CBD oil and CBD treats company) offers a blend of probiotics formulated by veterinarians, containing six strains of probiotic bacteria. It’s our top pick for the best dog probiotic powder. Honest Paws probiotics for dogs are a unique probiotic supplement that contains Solarplast, an extract of organic spinach, a rich source of antioxidants, and their enzyme partners. Solarplast provides many benefits for healthy aging and optimal biological processes through restoration and repair.

What sets it apart from competitors: It includes Inulin, a natural prebiotic derived from Chicory that stimulates good bacteria.

Probiotics strains: Inulin (prebiotic), Bacillus subtilis (DE111), Bacillus coagulans, Bifidobacterium animalis lactis, Bifidobacterium longum, Lactobacillus acidophilus, and Lactobacillus plantarum. 

Pros

  • NASC certified
  • Chicken-flavored
  • Third-party lab tested
  • Organic

Cons

  • Contains a rice hull and rice extract blend, which may cause sensitivity in some dogs

Grain-Free Probiotics For Dogs

4.7

Zesty Paws Probiotics For Dogs

Who It’s For: Pet parents with grain-intolerant dogs needing a probiotic that aligns