Horses

Horse Sleep Welfare and Rest Needs

Horses have unique sleep requirements including brief periods of REM sleep that require lying down, and inadequate rest opportunities cause significant welfare problems.

Key Facts

Horses need only 2-3 hours of total sleep per day but require at least 30 minutes of REM (lying down) sleep
Horses can doze standing up but cannot achieve REM sleep without lying down
Sleep deprivation in horses causes sudden collapse due to muscle weakness from lack of deep rest
Group-housed horses feel safer lying down and achieve REM sleep more easily
Hard, wet, or sloped floors discourage horses from lying down, risking sleep deprivation

Welfare Considerations

Sleep deprivation is an underrecognized welfare issue in horses. Many stabled horses never achieve adequate REM sleep because they feel unsafe, the stall floor is uncomfortable, or there is insufficient space to lie down and get up safely. Signs include daytime sleepiness, stumbling, and collapse while dozing standing. Providing deep, dry bedding, adequate space, and stable companionship significantly improves sleep quality and overall welfare.

What You Can Do

Ensure stall bedding is deep, dry, and comfortable enough for horses to lie down
Provide at least 12x12 foot stalls so horses can lie flat comfortably
House horses with companions or visual contact to reduce isolation anxiety
Learn to recognize signs of sleep deprivation: stumbling, sudden collapse, excessive yawning
Consult a vet if your horse rarely lies down or shows signs of sleep deprivation