Research overview: feline coronavirus shedding in multi-cat environments

Feline coronavirus spreads efficiently by the fecal-oral route, and in multi-cat households, catteries, and shelters most cats become infected and shed virus, with some becoming persistent shedders that maintain endemic circulation. High cat density, shared litter boxes, and stress increase transmission and may raise the per-cat risk that enteric infection mutates into FIP. This overview synthesizes shedding and management studies rather than one citation, describing patterns of intermittent versus chronic shedding, why crowded environments amplify both infection and FIP risk, and how interventions such as reducing density, improving litter hygiene, and separating age groups can lower coronavirus burden. It matters because environmental management is one of the few available levers for reducing FIP incidence in groups of cats.