The gut microbiome of companion animals plays an increasingly recognised role in overall health, immunity, and behaviour, with diet quality being the primary modifiable factor for owners.
Gut health represents an emerging frontier in companion animal welfare that is increasingly supported by microbiome research. The quality of diet an animal receives affects not only nutritional status but also the microbial community that shapes immune function, inflammation, and even behaviour through the gut-brain axis. Animals fed highly processed, nutritionally adequate but microbiologically impoverished diets may be missing gut health dimensions that affect their long-term wellbeing in ways that biochemical nutritional adequacy does not capture. This is a rapidly evolving field where the evidence base is growing faster than clinical guidelines, making it important for owners to engage critically with emerging research rather than accepting marketing claims at face value.