The canine gut microbiome is increasingly recognized as central to health and behavior. Understanding the microbiome-welfare connection helps owners make better decisions about diet and probiotic use.
The gut-brain connection in dogs means that microbiome health is directly relevant to welfare through effects on mood, anxiety, and stress responsiveness as well as physical gastrointestinal health. Chronic stress disrupts the microbiome, which in turn amplifies anxiety responses in a bidirectional cycle. Minimizing unnecessary antibiotic use, feeding high-quality diverse diets, managing environmental stress, and supporting microbiome recovery after disruption all contribute to welfare through this pathway. While probiotic evidence in healthy dogs is limited, probiotics after antibiotic treatment have more support. This is an evolving field where evidence-based practice will refine recommendations as research matures.