Companion Animal Gut Health: What the Research Shows

The growing science of gut microbiome health in dogs and cats, what diet and lifestyle factors matter, and evidence-based recommendations.

Key Facts

Dogs and cats have complex gut microbiomes with hundreds of bacterial species
Diet is the primary driver of gut microbiome composition in companion animals
Antibiotic use significantly disrupts the gut microbiome and may have lasting effects
Probiotics and prebiotics are increasingly studied for companion animal health
Fiber-rich diets are associated with healthier gut microbiomes in dogs

Welfare Considerations

Gut health is increasingly recognized as central to companion animal wellbeing, affecting not just digestion but immune function, behavior, and even mental health via the gut-brain axis. Signs of poor gut health in pets include chronic diarrhea, vomiting, flatulence, and poor coat condition. Overuse of antibiotics is a significant concern, as it can strip the microbiome of beneficial bacteria. Research into species-appropriate diets and the role of dietary fiber is ongoing and promising.

What You Can Do

Feed high-quality, minimally processed foods appropriate to your pet species
Discuss probiotic and prebiotic options with your veterinarian
Minimize unnecessary antibiotic use and always complete prescribed courses
Introduce dietary changes gradually to avoid disrupting gut bacteria
Maintain regular veterinary check-ups to catch digestive issues early