Most Beneficial Bacterial Strains for Your Dog

  • By Raquel Astacio
Jack Russell Terrier reading a book with a pencil in its mouth

Mention the word “bacteria” and people immediately think of diseases and infections that require treatment with antibiotics or antiseptics formulated to kill harmful bacteria. However, what isn’t so well known is the fact that “good” bacteria necessary for maintaining overall health co-exist with “bad” bacteria, which are directly responsible for all kinds of canine medical issues.

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Without the right amount of good bacteria living in their gastrointestinal system, dogs (just like humans) can suffer from a wide variety of illnesses, such as:

  • Diarrhea/mild dehydration/irritable bowel syndrome
  • Chronic skin infections (allergies, dermatitis, yeast and parasitic)
  • Oral diseases (gingivitis, periodontitis, tooth loss, halitosis)
  • Vaginitis in female dogs
  • Increased energy due to optimal absorption of nutrients from food passing through the GI tract

Probiotics are supplements containing rich amounts of good bacteria that help restore bacteria balance to gut flora so that dogs feel great and look great. What makes probiotics so effective are the strains of beneficial bacteria included in the formula.

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The increase an energy that canine probiotics provide means more play time!

5 Specific Strains of Bacteria that Enhance Canine Health

1. Enterococcus faecium

Enterococcus faecium replaces “bad”bacteria eradicated by “good” bacteria, which naturally promotes higher levels of anti-inflammatory bacteria in the GI tract. Other properties characterizing the probiotic Enterococcus faecium include:

  • Delivers inhibitory effects against shigella, E. coli, salmonella and various enteropathogens
  • Works to stop and prevent infectious diarrhea and antibiotic-induced diarrhea
  • Boosts immune response and stimulates immune system functioning (an action especially important in puppies up to one year old and elderly dogs over nine years old)
  • Improves microfloral balance in all dogs undergoing stress
  • Increases growth of other good bacteria in the canine GI tract (specifically lactobacilli and bifidobacteria)

2. Bacillus coagulans

This strain of probiotic bacteria is powerfully effective against many kinds of infectious diarrhea, such as rotaviral, antibiotic-caused and “traveler’s” diarrhea. Bacillus coagulans also reduces instances of general digestive problems in dogs and helps prevent:

  • Irritable bowel syndrome/inflammatory bowel disease
  • Ulcerative colitis
  • Crohn’s disease
  • Clostridium difficile (inflammation of the colon and large intestine)

Although Bacillus coagulans promotes production of lactic acid, it is not a lactic acid bacteria. Unlike lactobacillus, Bacilla coagulans form spores (reproductive structures) that distinguish it from lactic acid bacteria. To veterinarians examining bacteria cultures taken from sick dogs, this is an important feature that facilitates diagnosing and treating illnesses involving the GI tract.

Additionally, the European Food Safety Authority has added Bacilla coagulans to their Qualified Presumption of Safety list. This probiotic was also approved for vetinary use by the European Union and the U.S. Food and Drug Administration’s Center for Veterinary Medicine over a decade ago. Moreover, Bacilla coagulans is regularly given to livestock to improve overall health and to female cows, pigs and poultry to prevent yeast infections from harming their reproductive systems.

3. Bifidobacterium animalis AHC7

Bifidobacteria are vital colonizers of the GI tract and an integral part of a healthy and normal microbiota existing in the intestines, stomach and colon. Research results regarding the efficacy of B. animalis AHC7 has found this bacteria to play a substantial role in preventing inflammatory activity, infection and resolving ideopathic canine diarrhea. In one study using mice as subjects, B. animalis AHC7 actually protected mice against salmonella infection.

B. animalis has not only demonstrated to decrease severity of acute diarrhea in dogs but has also shown to increase good bacteria levels and enhance overall intestinal health. In a study using dogs with acute diarrhea, researchers discovered that B. animalis attached to the dogs’ epithelial (lining) cells in the GI tract, rapidly reproduced and significantly weakened the population of diarrhea-causing bacteria in the intestines. Authors of this report concluded that B. animalishas significant potential for improving canine gastrointestinal health.”

3D rendering of salmonella bacterium

Bifidobacterium animalis AHC7 may help protect against salmonella infections.

4. Lactobacillus acidophilus

When humans take a regimen of prescribed antibiotics for an extended period, they are typically advised by their doctor to supplement their diet with Lactobacillus acidophilus to recolonize their GI tract with healty bacteria.

Additional benefits of L. acidophilus that apply to dogs, as well as people, include:

  • The ability to produce acidocin CH5, an L. acidophilus bacteriocin that exhibits antibacterial and antifungal properties
  • Protection against salmonella and campylobacter jejuni, an infectious bacterial disease causing cramping, stomach pain, fever and diarrhea
  • Providing preventative effects against diarrhea associated with antibiotic use
  • May help reduce cholesterol levels
  • Promotes weight gain/growth in puppies and younger dogs
Illustration of lactobacillus acidophilus

Lactobacillus acidophilus helps prevent diarrhea caused by antibiotic use.

5. L. rhamnosus, L. fermentum, L. reuteri and L. salivarius

All four of these probiotics figure prominently in populations of normal canine microbiota. Along with providing strong anti-microbial activity in the GI tract, these bacteria are also extremely vigorous and capable of significantly modifying and improving inferior intestinal health. L. reuteri, for example, has been found to be helpful in preventing or alleviating canine intestinal infections.

Benefits of Probiotic Mixtures Over Single Strains of Bacteria

Recent studies have shown that probiotic mixtures proved to be more effective against a variety of health issues in contrast to single bacteria strains. End points benefiting by probiotic mixtures include irritable bowel syndrome, diarrhea, upper respiratory infections, atopic diseases and modulation of gut microbiota.

In summary, adult dogs and puppies given multi-bacterial probiotic supplements enjoy better health, increased energy, less susceptibility to airborne and skin allergies and minimal problems with most types of gastrointestinal infections that can negatively affect other physiological systems.

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Probiotics can help your dog enjoy better health and increased energy!

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Disclaimer: the advice and information in this article is not intended to be used as a replacement for professional medical advice from a veterinarian.

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  • Thank you!

    Llewellyn Cronje 3 months ago Reply


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