Submitted Successfully!
Thank you for your contribution! You can also upload a video entry related to this topic through the link below:
Check Note
Ver. Summary Created by Modification Content Size Created at Operation
1 + 1375 word(s) 1375 2021-12-07 04:19:07 |
2 The format is correct. Meta information modification 1375 2021-12-16 09:38:42 |
Influence of Probiotic Supplementation on Health of Dogs
Upload a video

Probiotics are live microorganisms that deliver health benefits to the host when administrated in an adequate amount. The possible mechanism behind probiotics’ beneficial effects could be their positive regulation of the host’s intestinal microbiota. Probiotics are reported to have therapeutic properties against canine GI and other diseases. 

canine probiotics microbiota Lactobacillus
Contributor :
View Times: 195
Revisions: 2 times (View History)
Update Time: 16 Dec 2021

1. Introduction

Companion dogs need nutritional care to maintain good health [1]. Dogs are fed with foods supplemented with appropriate nutrients such as choline, vitamins (E, B5, B3, B2, B1, K, B6, A, B9, B12, D), and minerals (calcium, potassium, phosphorus, magnesium, etc.) in addition to the dietary components, such as proteins, carbohydrates, fats, and fibers [1]. Malnutrition can occur due to an excess or a deficiency in nutrient intake, which could be harmful to dogs [2]. The nutritional requirements of each dog can differ based on the dog’s breed, size, developmental stage, and level of activity [1]. Even if companion animals are fed with nutritionally balanced diets to maintain good health, any differences in their normal microbiota can facilitate illness upon exposure to harmful environmental influences and pathogens [3][4]. The supplementation of probiotics positively regulates the microbiota of the host and improves their health [5][6][7]. The joint Food and Agriculture Organization (FAO) of the United Nations and World Health Organization (WHO) defines the term “probiotics” as “live microorganisms which when administered in adequate amounts confer a health benefit on the host” [8]. The term “probiotics” refers to live microbes (isolated from different sources, such as gut commensals, fermented foods, and any other source) that have been characterized and evidenced in adequate controlled studies to have a health beneficial effect, and their safety has been verified. Even though microbial components, dead microbes, and microbial products exhibit health beneficial effects, they should not be considered as probiotics [9]. The ideal characteristics of probiotics include being non-pathogenic to the host, the ability to tolerate low pH levels and high concentrations of bile acids in the gastrointestinal environment, and the ability to proliferate in the gut by adhering to the intestinal epithelium. For economically viable production, the probiotics should also preferably have the ability to grow well on inexpensive media and tolerate manufacturing, transportation, and storage processes [10][11]. Probiotic supplementation aids in maintaining gut health by preventing or controlling pathogens in the gastrointestinal tract and promoting the population of favorable gastrointestinal tract microflora. The modes of action of probiotics might be strain-specific [11]. Since the supplementation of probiotics is not universally safe and effective in humans [12], probiotics should also be used with caution in companion animals until the limitations of probiotics usage in companion animals are found. Probiotics have been reported to have several health benefits in humans, such as facilitating dental health [13], aiding in cancer management [14], exerting cholesterol-lowering abilities [15], controlling diabetes mellitus [16], and exhibiting immune-stimulating properties [17]. Generally, probiotics that are beneficial to humans are considered to be safe, but canine-derived probiotics could be used safely for canine animals [18].
The intervention of a probiotic-supplemented diet can protect dogs from various health effects. The supplementation of probiotics has been used for the alleviation or prevention of atopic dermatitis [19][20] and treatment of gastrointestinal diseases, such as diarrheal diseases [21][22][23][24][25] in companion animals.

2. Characterization of the Microbiota in Dogs

The microbiomes of humans and pet animals have similarities [26], and the microbiota play a critical role in health and diseases among pet animals [27][28]. Previous bacterial-culture-based studies showed that healthy dogs contain a 102 to 1011 CFU/g bacterial load in their gastrointestinal (GI) tracts. Recently, high-throughput DNA sequencing techniques were implemented to determine the microbiomes of canines [29]. Current molecular methods revealed that the microbial loads of healthy dogs can range from 1012 to 1014 [30][31][32]. Garcia–Mazcorro et al. [33] reported that Firmicutes was the predominant phylum, followed by Actinobacteria, Proteobacteria, and Bacteroidetes, which were identified in the fecal microbiome of healthy dogs. Fusobacteria and Acidobacteria were the least abundant phylum compared to the other identified phyla in the fecal microbiome of healthy dogs [33]. Jha et al. [34] reported the same set of phyla as the predominant one found in the fecal samples of dogs [34].
The microbial load of each segment in the GI tract varies based on that section’s physiological functions [35][36]. For instance, the small intestine is rich in aerobic and facultative anaerobic bacteria, while the colon harbors anaerobic bacteria [35]. Individual variations in the microbiota of different intestinal compartments (such as higher diversity indices for the colon, rectum than those of duodenum, jejunum, and ileum within individual dogs) may also be present, and these variations must be taken into account to explain the microbiota of healthy dogs [36]. The results can fluctuate based on the sequencing method and depth of the study. Some studies showed that Firmicutes (abundant in duodenum, jejunum, ileum, and colon), Fusobacteria (abundant in ileum, and colon), Bacteroidetes (abundant in ileum, and colon) [37], Proteobacteria (abundant in duodenum [37][38], jejunum, ileum [38], and rectum [37]), and Actinobacteria [37] are the primary phyla identified in the GI tract of the dog microbiota [37][38].

3. Health Benefits of Probiotic Supplementation in Healthy Dogs

3.1. Microbiota Changes and Other Benefits in Healthy Dogs upon Probiotic Supplementation

The supplementation of Enterococcus faecium NCIB 10415 (derived from healthy adult canine feces) (9.2 × 109 CFU/dog/day) for 18 days reduced the fecal count of Clostridium spp. in healthy dogs. E. faecium NCIB 10415 lowered the fecal count of Campylobacter spp. and Salmonella spp. in a few healthy dogs and insignificantly increased the fecal count of Campylobacter spp. and Salmonella spp. in the majority of the healthy dogs, indicating that E. faecium NCIB 10415 was not effective in inhibiting the growth of Campylobacter spp. and Salmonella spp. in the majority of healthy dogs.
Biagi et al. [39] studied the effects of Lactobacillus animalis LA4 (derived from healthy adult canine feces) on the composition and metabolism of dog intestinal microbiota under both in vitro and in vivo conditions. The in vitro evaluation showed that upon exposure of L. animalis LA4 to adult dog fecal cultures, L. animalis LA4 increased the count of Lactobacillus and reduced the Clostridium perfringens count. Moreover, LA4 increased the level of lactic acid in fecal cultures. LA4 reduced the ammonia concentration under in vitro conditions, while fecal concentration of ammonia was not influenced by LA4 under in vivo conditions. When healthy dogs (n = 9 adult) were fed with L. animalis LA4 (109 CFU/g; 0.5 g per dog per day) for 10 days, the count of Lactobacillus was increased, and the enterococci count was reduced. The in vivo evaluations of Lactobacillus count also supported the findings of the in vitro experiments. The in vivo results showed that the strain LA4 could withstand the gastrointestinal environment and proliferate in the intestines of the studied adult dogs [39].

3.2. Immune Immunomodulatory Properties

L.johnsonii CPN23 (canine origin) administration to healthy adult Labrador dogs improved the fecal acetate and butyrate levels. L. johnsonii CPN23 also reduced fecal ammonia concentrations. Cell-mediated immune response was also evaluated as type-IV delayed-type hypersensitivity reaction to intradermally injected phytohaemagglutinin-P. CPN23 administration improved the cell-mediated immune response (as delayed-type hypersensitivity response in the form of increase in skin induration) in healthy dogs. There was no change in the antibody response to sheep erythrocytes. The study concluded that L. johnsonii CPN23 could be used to achieve improvements in canine health [40].

4. Health Benefits of Probiotic Supplementation in Diseased Dogs

4.1. Chronic Kidney Disease

VSL#3 supplementation effectively increased the glomerular filtration rate (GFR) in dogs with chronic kidney disease. In more detail, the 60-day administration of VSL#3 (a mixture of probiotics containing L. caseiL. plantarumL. acidophilusLactobacillus delbrueckii subsp. bulgaricusB. longumBifidobacterium breveBifidobacterium infantis, and Streptococcus salivarius subsp. thermophilus; 112 to 225 × 109 CFU/10 kg body weight; every 24 h) to dogs (n = 30) with chronic kidney disease increased the GFR compared to that of the control group (n = 30) and baseline values [41].

4.2. Atopic Dermatitis

The oral administration of probiotic strain Lactobacillus sakei probio-65 (2 × 109 CFU per gram per day for two months) to dogs (n = 32) diagnosed with canine AD effectively reduced the disease severity index measured by CADESI scoring system. The double-blind placebo-controlled study demonstrated that L. sakei probio-65 could be considered an adjuvant therapeutic agent to manage canine AD [42].
B.longum (5 × 1010 CFU/day) was orally supplemented in dogs with AD for 12 weeks, and the severity of the skin lesions was assessed using the CADESI score. Pruritus severity was also assessed using the pruritus visual analog scale (PVAS). The transepidermal water loss (TEWL) and the medication score was also recorded. The data were collected every four weeks of the study. The results revealed that the administration of B. longum progressively reduced the CADESI score compared to the baseline, whereas probiotic supplementation was not effective in reducing the TEWL, PVAS, and medication scores. The study determined that B. longum could improve skin lesions in dogs [43].


  1. National Research Council. Nutrient Requirements of Dogs and Cats; The National Academies Press: Washington, DC, USA, 2006.
  2. Thatcher, C.D.; Hand, M.S.; Remillard, R.L. Small animal clinical nutrition: An interactive process. In Small Animal Clinical Nutrition, 5th ed.; Hand, M.S., Thatcher, C.D., Remillard, R.L., Roudebush, P., Novotny, B.J., Eds.; Mark Morris Institute: Topeka, Kansas, 2010; pp. 1–18.
  3. Grześkowiak, Ł.; Endo, A.; Beasley, S.; Salminen, S. Microbiota and probiotics in canine and feline welfare. Anaerobe 2015, 34, 14–23.
  4. Pilla, R.; Suchodolski, J.S. The Gut Microbiome of Dogs and Cats, and the Influence of Diet. Vet. Clin. Small Anim. 2021, 51, 605–621.
  5. Abenavoli, L.; Scarpellini, E.; Colica, C.; Boccuto, L.; Salehi, B.; Sharifi-Rad, J.; Aiello, V.; Romano, B.; De Lorenzo, A.; Izzo, A.A.; et al. Gut Microbiota and Obesity: A Role for Probiotics. Nutrients 2019, 11, 2690.
  6. Abdellatif, B.; McVeigh, C.; Bendriss, G.; Chaari, A. The Promising Role of Probiotics in Managing the Altered Gut in Autism Spectrum Disorders. Int. J. Mol. Sci. 2020, 21, 4159.
  7. Arora, K.; Green, M.; Prakash, S. The microbiome and Alzheimer’s Disease: Potential and limitations of prebiotic, synbiotic, and probiotic formulations. Front. Bioeng. Biotechnol. 2020, 8, 537847.
  8. FAO/WHO. Health and Nutritional Properties of Probiotics in Food including Powder Milk with Live Lactic Acid Bacteria; Food and Agriculture Organization of the United Nations: Cordoba, Argentina, 2001.
  9. Hill, C.; Guarner, F.; Reid, G.; Gibson, G.R.; Merenstein, D.J.; Pot, B.; Morelli, L.; Canani, R.B.; Flint, H.J.; Salminen, S.; et al. The International Scientific Association for Probiotics and Prebiotics consensus statement on the scope and appropriate use of the term probiotic. Nat. Rev. Gastroenterol. Hepatol. 2014, 11, 506–514.
  10. Collins, J.; Thornton, G.; Sullivan, G. Selection of probiotic strains for human applications. Int. Dairy J. 1998, 8, 487–490.
  11. Bajagai, Y.S.; Klieve, A.V.; Dart, P.J.; Bryden, W.L. Probiotics in Animal Nutrition–Production, Impact and Regulationby FAO Animal Production and Health Paper No. 179; Harinder, P.S., Ed.; FAO: Rome, Italy, 2016; ISBN 978-92-5-109333-7.
  12. Kothari, D.; Patel, S.; Kim, S.-K. Probiotic supplements might not be universally-effective and safe: A review. Biomed. Pharmacother. 2019, 111, 537–547.
  13. Sivamaruthi, B.S.; Kesika, P.; Chaiyasut, C. A review of the role of probiotic supplementation in dental caries. Probiotics Antimicrob. Proteins 2020, 12, 1300–1309.
  14. Sivamaruthi, B.S.; Kesika, P.; Chaiyasut, C. The role of probiotics in colorectal cancer management. Evid. Based Complement. Alternat. Med. 2020, 2020, 3535982.
  15. Sivamaruthi, B.S.; Kesika, P.; Chaiyasut, C. A mini-review of human studies on cholesterol-lowering properties of probiotics. Sci. Pharm. 2019, 87, 26.
  16. Kesika, P.; Sivamaruthi, B.S.; Chaiyasut, C. Do probiotics improve the health status of individuals with diabetes mellitus? A review on outcomes of clinical trials. Bio. Med. Res. Int. 2019, 2019, 1531567.
  17. Ashraf, R.; Shah, N.P. Immune system stimulation by probiotic microorganisms. Crit. Rev. Food Sci. Nutr. 2014, 54, 938–956.
  18. Kelley, R.L.; Park, J.S.; O’Mahony, L.; Minikhiem, D.; Fix, A. Safety and tolerance of dietary supplementation with a canine-derived probiotic (Bifidobacterium animalis strain AHC7) fed to growing dogs. Vet. Ther. 2010, 11, E1–E14.
  19. Marsella, R. Evaluation of Lactobacillus rhamnosus strain GG for the prevention of atopic dermatitis in dogs. Am. J. Vet. Res. 2009, 70, 735–740.
  20. Marsella, R.; Santoro, D.; Ahrens, K. Early exposure to probiotics in a canine model of atopic dermatitis has long-term clinical and immunological effects. Vet. Immunol. Immunopathol. 2012, 146, 185–189.
  21. Sauter, S.N.; Benyacoub, J.; Allenspach, K.; Gaschen, F.; Ontsouka, E.; Reuteler, G.; Cavadini, C.; Knorr, R.; Blum, J.W. Effects of probiotic bacteria in dogs with food responsive diarrhea treated with an elimination diet. J. Anim. Physiol. Anim. Nutr. 2006, 90, 269–277.
  22. Gómez-Gallego, C.; Junnila, J.; Männikkö, S.; Hämeenoja, P.; Valtonen, E.; Salminen, S.; Beasley, S. A canine-specific probiotic product in treating acute or intermittent diarrhea in dogs: A double-blind placebo-controlled efficacy study. Vet. Microbiol. 2016, 197, 122–128.
  23. Nixon, S.L.; Rose, L.; Muller, A.T. Efficacy of an orally administered anti-diarrheal probiotic paste (Pro-Kolin Advanced) in dogs with acute diarrhea: A randomized, placebo-controlled, double-blinded clinical study. J. Vet. Intern. Med. 2019, 33, 1286–1294.
  24. Shmalberg, J.; Montalbano, C.; Morelli, G.; Buckley, G.J. A randomized double blinded placebo-controlled clinical trial of a probiotic or metronidazole for acute canine diarrhea. Front. Vet. Sci. 2019, 6, 163.
  25. Fenimore, A.; Martin, L.; Lappin, M.R. Evaluation of Metronidazole with and without Enterococcus faecium SF68 in shelter dogs with diarrhea. Top. Companion Anim. Med. 2017, 32, 100–103.
  26. Coelho, L.P.; Kultima, J.R.; Costea, P.I.; Fournier, C.; Pan, Y.; Czarnecki-Maulden, G.; Hayward, M.R.; Forslund, S.K.; Schmidt, T.S.B.; Descombes, P.; et al. Similarity of the dog and human gut microbiomes in gene content and response to diet. Microbiome 2018, 6, 72.
  27. Hooda, S.; Minamoto, Y.; Suchodolski, J.S.; Swanson, K.S. Current state of knowledge: The canine gastrointestinal microbiome. Anim. Health Res. Rev. 2012, 13, 78–88.
  28. Redfern, A.; Suchodolski, J.; Jergens, A. Role of the gastrointestinal microbiota in small animal health and disease. Vet. Rec. 2017, 181, 370.
  29. Brown, C.M.; Staley, C.; Wang, P.; Dalzell, B.; Chun, C.L.; Sadowsky, M.J. A High-Throughput DNA-Sequencing Approach for Determining Sources of Fecal Bacteria in a Lake Superior Estuary. Environ. Sci. Technol. 2017, 51, 8263–8271.
  30. German, A.J.; Day, M.J.; Ruaux, C.G.; Steiner, J.M.; Williams, D.A.; Hall, E.J. Comparison of direct and indirect tests for small intestinal bacterial overgrowth and antibiotic-responsive diarrhea in dogs. J. Vet. Intern. Med. 2003, 17, 33–43.
  31. Mentula, S.; Harmoinen, J.; Heikkilä, M.; Westermarck, E.; Rautio, M.; Huovinen, P.; Könönen, E. Comparison between cultured small-intestinal and fecal microbiotas in beagle dogs. Appl. Environ. Microbiol. 2005, 71, 4169–4175.
  32. Suchodolski, J.S. Intestinal microbiota of dogs and cats: A bigger world than we thought. Vet. Clin. N. Am. Small Anim. Pract. 2011, 41, 261–272.
  33. Garcia-Mazcorro, J.F.; Dowd, S.E.; Poulsen, J.; Steiner, J.M.; Suchodolski, J.S. Abundance and short-term temporal variability of fecal microbiota in healthy dogs. Microbiologyopen 2012, 1, 340–347.
  34. Jha, A.R.; Shmalberg, J.; Tanprasertsuk, J.; Perry, L.; Massey, D.; Honaker, R.W. Characterization of gut microbiomes of household pets in the United States using a direct-to consumer approach. PLoS ONE 2020, 15, e0227289.
  35. Pilla, R.; Suchodolski, J.S. The Role of the Canine Gut Microbiome and Metabolome in Health and Gastrointestinal Disease. Front. Vet. Sci. 2020, 6, 498.
  36. Suchodolski, J.S.; Ruaux, C.G.; Steiner, J.M.; Fetz, K.; Williams, D.A. Assessment of the qualitative variation in bacterial microflora among compartments of the intestinal tract of dogs by use of a molecular fingerprinting technique. Am. J. Vet. Res. 2005, 66, 1556–1562.
  37. Honneffer, J.B.; Steiner, J.M.; Lidbury, J.A.; Suchodolski, J.S. Variation of the microbiota and metabolome along the canine gastrointestinal tract. Metabolomics 2017, 13, 26.
  38. Suchodolski, J.S.; Camacho, J.; Steiner, J.M. Analysis of bacterial diversity in the canine duodenum, jejunum, ileum, and colon by comparative 16S rRNA gene analysis. FEMS Microbiol. Ecol. 2008, 66, 567–578.
  39. Biagi, G.; Cipollini, I.; Pompei, A.; Zaghini, G.; Matteuzzi, D. Effect of a Lactobacillus animalis strain on composition and metabolism of the intestinal microflora in adult dogs. Vet. Microbiol. 2007, 124, 160–165.
  40. Kumar, S.; Pattanaik, A.K.; Sharma, S.; Jadhav, S.E.; Dutta, N.; Kumar, A. Probiotic potential of a Lactobacillus bacterium of canine faecal-origin and its impact on select gut health indices and immune response of dogs. Probiotics Antimicrob. Proteins 2017, 9, 262–277.
  41. Lippi, I.; Perondi, F.; Ceccherini, G.; Marchetti, V.; Guidi, G. Effects of probiotic VSL#3 on glomerular filtration rate in dogs affected by chronic kidney disease: A pilot study. Can. Vet. J. 2017, 58, 1301–1305.
  42. Kim, H.; Rather, I.A.; Kim, H.; Kim, S.; Kim, T.; Jang, J.; Seo, J.; Lim, J.; Park, Y.H. A double-blind, placebo controlled-trial of a probiotic strain Lactobacillus sakei probio-65 for the prevention of canine atopic dermatitis. J. Microbiol. Biotechnol. 2015, 25, 1966–1969.
  43. Lee, K.; Yun, T.; Ham, J.; Lee, W.; Kang, J.; Yang, M.; Kang, B. Clinical trial of oral administration of Bifidobacterium longum in dogs with atopic dermatitis. Korean J. Vet. Res. 2020, 60, 19–24.
Contributor MDPI registered users' name will be linked to their SciProfiles pages. To register with us, please refer to :
View Times: 195
Revisions: 2 times (View History)
Update Time: 16 Dec 2021
Table of Contents


    Are you sure to Delete?

    Video Upload Options

    Do you have a full video?
    If you have any further questions, please contact Encyclopedia Editorial Office.
    Chaiyasut, C. Influence of Probiotic Supplementation on Health of Dogs. Encyclopedia. Available online: (accessed on 03 October 2022).
    Chaiyasut C. Influence of Probiotic Supplementation on Health of Dogs. Encyclopedia. Available at: Accessed October 03, 2022.
    Chaiyasut, Chaiyavat. "Influence of Probiotic Supplementation on Health of Dogs," Encyclopedia, (accessed October 03, 2022).
    Chaiyasut, C. (2021, December 16). Influence of Probiotic Supplementation on Health of Dogs. In Encyclopedia.
    Chaiyasut, Chaiyavat. ''Influence of Probiotic Supplementation on Health of Dogs.'' Encyclopedia. Web. 16 December, 2021.