Primitive Probiotics™

Primitive Probiotics™

Formulated by Dr. Karen Becker with three distinct microbial ecosystems that create a resilient, well-adapted, and functional gut flora

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Product Information

  • Thoughtfully selected probiotic strains for dogs, chosen to complement the canine digestive environment and support normal digestive function and microbial balance.
  • PRIMITIVE PROBIOTICS™ combines diverse microbial sources, including strains sourced from wild canids and healthy domestic dogs alongside soil-based organisms, for a well-rounded approach to everyday microbiome support.
  • A three-ecosystem approach supports microbial diversity, combining ancestral strains, modern canine strains, and soil-based organisms to help maintain a balanced and diverse gut microbiome.
  • Selected probiotic strains provide targeted everyday support, helping maintain normal digestive function, stool quality, microbial balance, immune function, and overall well-being.
  • Thoughtfully formulated and third-party tested, PRIMITIVE PROBIOTICS™ is free from fillers and prebiotics, suitable for all life stages, and designed to support everyday canine digestive wellness.
  • A balanced gut microbiome is an important part of everyday well-being. This veterinary-formulated blend combines LP815 with S. boulardii to support microbial balance and normal digestive function.

Directions of Use

Sprinkle the recommended amount directly onto food or a snack once daily.

For dogs with sensitive stomachs, start with half the suggested dose for the first few days and gradually increase to a full dose.

If using during antibiotic therapy, give the probiotic at least 4 hours before or after antibiotics to help protect beneficial bacteria. (based on 1 Billion CFU per 1.5 g serving)

  • Small Dogs: under 15 lbs - 1/2 scoop(0.75 g)
  • Medium Dogs: under 15-40 lbs - 1 scoop(1.5 g)
  • Large Dogs: under 40-80 lbs1 - 1 ½ scoop(2.25 g)
  • Extra Large Dogs: over 80 lbs - 2 scoops(3 g)

Product Ingredients

  • Canine Heritage Blend - Dog Strains: 600 Million CFU
  • Lactobacillus casei K9-1
  • Lactobacillus fermentum K9-2
  • Lactobacillus reuteri PCR7 
  • Pediococcus acidilactici PCLL01
  • Bifidobacterium bifidum
  • Bacillus subtilis
  • Non-Spore Forming Probiotics and Yeast Blend: 200 Million CFU
  • Lactiplantibacillus plantarum LP815™
  • Saccharomyces boulardii
  • Lactobacillus rhamnosus GG
  • Soil-Based Probiotics Blend: 150 Million CFU
  • OptiBiome BS50® Bacillus subtilis
  • MuniSpore® Bacillus clausii CS108
  • Canine Ancestral Blends - Wolf Strain: 50 Million CFU
  • Lactobacillus reuteri WF-1
  • Lactobacillus brevis WF-1B

Inactive: Organic Pumpkin Powder (Cucurbita moschata)

Discover More About Primitive Probiotics™ for Dogs

  • Fresh until October 2027
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Why Primitive Probiotics Is the Best Probiotic for Dogs

Primitive Probiotics™ blends three distinct microbial ecosystems that together create a resilient, well-adapted, and functional gut flora:


1. Ancestral Strains

These strains are isolated from wild wolves and represent the ancient microbial allies that dogs evolved with: robust, immune-priming, and genetically aligned with the canine body.

2. Species-Specific Strains

Sourced from healthy domestic dogs, these strains are uniquely adapted to the stressors and diets of modern life. They’re highly colonizable and provide targeted support for digestion, immunity, and stress tolerance.

3. Soil-Based Organisms (SBOs)

Spore-forming probiotics like Bacillus subtilis and Bacillus clausii are natural survivors. They resist heat, stomach acid, and antibiotics; modulating inflammation and restoring balance when your dog needs it most.

Canine-Derived Strains for Modern Dogs: Precision for the Present

dog check up

Canine-Derived Strains for Modern Dogs: Precision for the Present

Today’s domestic dogs face modern challenges their wild counterparts never encountered:

  • Frequent antibiotic/medication exposure that disrupts the microbiome
  • Urban environments, increased environmental pollutants
  • Highly processed diets
  • Chronic low-grade inflammation
  • Reduced microbial diversity due to indoor lifestyles



dog and human

Summary of Canine Strain Benefits:

  • Increases beneficial gut bacteria
  • Reduces harmful pathogens
  • Strengthens gut barrier and tight junctions
  • Supports digestion, immunity, and metabolism
  • Backed by multi-trial clinical research in dogs
  • FDA GRAS and Health Canada VHP compliant
  • Adapted to survive and thrive in your dog’s gut

Can PRIMITIVE PROBIOTICS™ Help My Dog?

PRIMITIVE PROBIOTICS™ is ideal for:

  • Puppies building a resilient microbiome from the start
  • Dogs with diarrhea, soft stools, or excessive gas
  • Dogs recovering from antibiotics and other microbiome-disrupting medications,illness, or stress
  • Dogs with anxiety, aggression, or sleep issues
  • Dogs needing immune and cognitive support

Results You Can See

  • lying dog
    24–48 Hours:

    Noticeably firmer stool, less gas and bloating

  • dog eating food
    1–2 Weeks:

    Calmer mood and better appetite

  • dog running
    4+ Weeks:

    Stronger immunity, more energy, improved sleep, better resilience

Why Vets Trust PRIMITIVE PROBIOTICS™

  • Designed by a functional medicine veterinarian and microbiome scientists
  • Built for the canine gut, not repurposed from human formulas
  • Third-party tested for purity, viability, and shelf stability
  • Free from fillers, preservatives, or synthetic flavors
  • Safe for long-term use in all breeds and life stages
  • Safety-certified: evaluated under FDA GRAS and Health Canada List C veterinary health standards
  • Clinically backed: supported by multi-site trials using real-world canine models, not rodents or petri dishes
  • Manufactured in the USA using Global Ingredients in a GMP-certified facility, following strict quality and safety guidelines to ensure purity, potency, and consistency
Veterinarian holding Proactive Paws Primitive Probiotics jar with a small dog on the exam table
The Perfect Partner for Probiotics: Pumpkin

The Perfect Partner for Probiotics: Pumpkin

Organic pumpkin fiber is a whole-food digestive superfood. With both soluble and insoluble fiber, it supports nutrient absorption, regular stools, and a balanced gut environment where probiotics thrive. Rich in vitamins, minerals, and antioxidants, pumpkin also nourishes the gut lining, calms inflammation, and strengthens immune defenses. Unlike isolated prebiotics that can trigger SIBO, pumpkin is gentle, effective, and biologically appropriate—making it the ideal daily partner for probiotics.

What’s NOT in PRIMITIVE PROBIOTICS

With gut issues like small intestine bacterial overgrowth (SIBO), prebiotics can worsen symptoms by fueling bacteria in the small intestine, increasing bloating, gas, and discomfort. In contrast, a dog gut health supplement with targeted probiotics may help rebalance microbes, reduce harmful species, and support the gut barrier without feeding the overgrowth. Strains like Saccharomyces boulardii and certain soil-based spore-formers are less likely to drive fermentation and may crowd out problematic microbes while calming inflammation. For this reason, we don’t include prebiotics in our formula.

Targeted. Tested. Trusted.

Because your dog deserves a microbiome designed by nature and validated by science.

PRIMITIVE PROBIOTICS™ isn’t just a supplement, it’s a strategy to support lifelong vitality from the inside out.

Give your dog the microbiome they were born to have.

Frequently ask questions

What makes Primitive Probiotics™ different from other dog probiotics?

Primitive Probiotics™ combines ancestral strains from wild wolves, species-specific strains from healthy domestic dogs, and ultra-resilient soil-based organisms (SBOs). This unique 3-in-1 formula delivers unmatched microbial diversity and survives stomach acid to truly transform your dog’s gut health.

Is Primitive Probiotics™ safe for puppies and senior dogs?

Yes. Primitive Probiotics™ is vet-formulated and safe for dogs of all ages, including puppies building a strong microbiome and seniors needing extra digestive and immune support.

How long does it take to see results?

Most dogs experience better stool quality and less gas within 24-48 hours. Calmer moods and reduced itching typically appear within 1-2 weeks, with stronger immunity and sustained energy by week 4.

Can this help my dog with anxiety or aggression issues?

Primitive Probiotics™ includes GABA-producing LP815, clinically shown to reduce anxiety, improve mood, and promote restful sleep, making it ideal for anxious or high-strung dogs.

If my dog has taken or is taking antibiotics, when should I give Primitive Probiotics™?

If your dog has recently finished a course of antibiotics, give Primitive Probiotics™ with meals to help rebuild and restore the microbiome. If your dog is currently taking antibiotics, administer Primitive Probiotics™ at least 4 hours before or after the antibiotic dose—never at the same time—to ensure both work effectively.

Can probiotics make my pet’s allergies worse because they produce histamine?

Certain probiotic strains may produce histamine, but instead of triggering allergies, they help calm inflammation, reduce inflammatory signaling, and support a balanced immune response. 

Do all probiotic strains produce histamine?

Only a small number of specific probiotic strains produce histamine. Histamine production isn’t necessarily harmful; in many cases, histamine production from probiotic strains can help maintain healthy immune and gut function.

Why doesn’t histamine from probiotics cause allergic reactions?

Histamine can act in different ways in the body. Some pathways trigger inflammation, while others help reduce it. Beneficial probiotic strains support the calming pathway, which helps regulate your pet’s immune system.

Why Are Some Glass Jars Only Half Full?

Our products contain the exact amount listed on the front of the bottle. Because we use standard glass jar sizes, some jars may appear half full or only two-thirds full, depending on the product. Using standard-sized jars helps keep costs down without affecting the amount of product you receive.