how long can a horse sit
Horses are polyphasic sleepers, which means they have multiple, discrete sleep episodes in a 24-hour period. Time budgets show that horses spend one to three hours (adding up all sleep episodes) in a 24 hour period lying down, in both sternal (upright) and lateral (flat on side) recumbency. Differences are seen according to feeding and turnout management (horses tend to lie down less in constant turnout).