The feline gut microbiome is increasingly understood as a mediator of stress and immune function, linking chronic welfare deficits to measurable health outcomes.
The link between feline chronic stress and physical illness is well-established but often poorly communicated to cat owners. A cat urinating outside the litter box or vomiting repeatedly may not have a primary physical disease — they may be displaying the physical consequences of chronic psychological stress in an environment that does not meet their needs. Understanding that welfare failures translate into veterinary costs changes the economic calculation for owners. Investment in environmental enrichment, appropriate multi-cat household management, and stress-reducing design does not just make cats happier — it reduces illness frequency and veterinary bill size significantly.