Providing adequate shelter for horses in winter is a fundamental welfare requirement — the appropriate type and extent of shelter depends on breed, body condition, and climate.
Horse winter welfare requires matching shelter provision to individual needs rather than applying a uniform standard. A hardy native pony in good body condition may be better served by access to hedgerow shelter than a blanket and stable. Conversely, a clipped thoroughbred or elderly horse losing condition in winter needs rugging and potentially supplementary feeding to maintain thermal comfort. Over-rugging causes welfare problems by overheating horses that can regulate their own temperature perfectly well without intervention.