Last Updated: 02/04/2026
Prebiotics, Probiotics & Postbiotics Explained
Discover how digestive supplements support your pet's gut health and immunity.
Author: Dr Teagan Lever BVSc (Hons)
Reading Time: 3 minutes - short read
Support your pet’s wellbeing from the inside out by leveraging the latest advancements in microbiome science.
As pet parents, most Australians understand that a happy pet starts with a settled stomach. Digestive issues, such as flatulence, intermittent loose stools, or "sensitive" digestion, remain among the most frequent reasons owners seek veterinary advice.
In recent years, veterinary medicine has seen a significant shift toward microbiome nutrition. With approximately 70% of a pet's immune system residing in the gut, digestive supplements are no longer viewed merely as a reactive fix for "the runs." Instead, they serve as a proactive tool to support immunity, skin health, and overall vitality.
In this article we will explore the world of digestive health supplements to help you choose the best option for your pet.
What are digestive supplements and how do they work?
Digestive supplements are "nutraceuticals": concentrated, functional ingredients designed to maintain the natural equilibrium of bacteria within the gastrointestinal tract.
To understand the gut, it is helpful to envision it as a complex ecosystem. For this ecosystem to thrive, it requires a robust population of "beneficial" bacteria to keep "pathogenic" bacteria in check. Digestive supplements for dogs and cats facilitate this balance through three primary mechanisms:
- Populating: Introducing beneficial live bacteria to the gut.
- Nourishing: Providing the specific nutrients required for beneficial bacteria to flourish.
- Fortifying: Strengthening the intestinal barrier (the gut lining) to prevent irritants from entering the bloodstream.
The "biotic" dictionary: Understanding the differences
The terminology surrounding gut health can be confusing. While these terms sound similar, they perform distinct roles in your pet's digestive physiology.
Prebiotics: the fuel
These are non digestible fibres, such as chicory root or beet pulp. While the pet cannot digest these fibres, their beneficial gut bacteria can. Prebiotics act as a food source, encouraging the growth of "good" microbes.
Probiotics: The beneficial bacteria
These are live, helpful microorganisms (such as Enterococcus faecium or Lactobacillus). When administered in therapeutic amounts, they help restore microbial balance, particularly following illness or a course of antibiotics.
Postbiotics: The beneficial byproducts
This represents the leading edge of gut science. Postbiotics are the bioactive compounds produced when probiotics consume prebiotics. A primary example is Short-Chain Fatty Acids (SCFAs), which provide essential energy to the cells lining the colon and exert anti-inflammatory effects throughout the body.
Synbiotics: the synergy
A synbiotic supplement contains both a prebiotic and a probiotic. They work in tandem; the prebiotic provides the "lunch," and the probiotic is the "guest" that consumes it.
Tribiotics: The comprehensive solution
A tribiotic is a high potency formula containing all three: prebiotics, probiotics, and postbiotics. This "three-in-one" approach simultaneously supports the bacteria, their food source, and the health giving byproducts.
When does a pet require digestive support?
While many pets benefit from a daily supplement for long term wellness, certain scenarios indicate a dog or cat may require additional support:
- Occasional Loose Stools or Flatulence: If a pet frequently experiences "soft" movements or excessive gas.
- Post Antibiotic Recovery: Antibiotics are essential for treating infections but often inadvertently eliminate beneficial bacteria. Supplements help "re-seed" the microbiome.
- Periods of Stress: Events such as boarding, moving house, or environmental stressors (like thunderstorms) can disrupt digestive equilibrium.
- Dietary Transitions: When moving a pet onto a new diet, a supplement can ensure the transition is seamless.
- Selective Eaters: Occasionally, a "fussy" appetite is an outward sign of underlying digestive discomfort.
When to consult a veterinarian
While supplements are an excellent tool for home care, they are not a substitute for professional medical intervention if a pet is clinically unwell. It is vital to book a veterinary consultation if any of the following symptoms are observed:
- Persistent vomiting or acute, severe diarrhoea.
- The presence of blood in the stool.
- Sudden lethargy, loss of appetite, or unexplained weight loss.
- Signs of abdominal pain, such as a "hunched" posture or vocalising.
Articles recommended for you
Our vet authored guide to the benefits of feeding your dog fresh food plus tips and advice for introducing it into their regular menu.
See our guide to protecting your pet from parasites from our vet team.
Thinking of getting a fish? Check out our guide for setting up a tank and home care tips!
Looking to understand horse feeds better? This comprehensive guide covers feeding recommendations for horses of all ages and disciplines.
Does your pet suffer from anxiety? Check out our Vet-guide for treatment options to help your pet.
History
Our experts continually monitor the health and wellness space and we update our articles when new information becomes available.
Tue Feb 11 2025
Edited by Dr Teagan Lever BVSc (Hons)Dr Teagan Lever BVSc (Hons)
Head Veterinarian, BVSc (Hons)
Pet Circle's Head Veterinarian, Dr Teagan graduated from the University of Queensland in 2010 and went on to work in small animal and mixed practice in various locations around QLD & ACT before joining Pet Circle in early 2016. Dr Teagan has special interests in dermatology, nutrition and preventative health care. She feels privileged to witness the special bond people share with their pets on a daily basis and enjoys forming lasting relationships with pet parents and their fur children.
