Worldwide, horses and other equids usually live outside with access to shelter from the elements. In some cases, animals are kept in a barn or stable, or may have access to a shed or shelter. Horses require both shelter from wind and precipitation, as well as room to exercise and run. They must have access to clean fresh water at all times, and access to adequate forage such as grass or hay. In the winter, horses grow a heavy hair coat to keep warm and usually stay warm if well-fed and allowed access to shelter.