18/05/2026
SLEEP DEPRIVATION IN HORSES 💤
Thanks to the horse’s unique stay apparatus, they are able to lightly sleep standing up. However, they do not obtain enough deep sleep – ‘paradoxical sleep’ – unless they lie down. This rapid eye movement (REM) sleep can only be achieved whilst they are laid down. Horses can manage without deep sleep for several days, but if they forgo it for a prolonged period they will become sleep deprived!
Historically, horses may have been diagnosed with ‘narcolepsy’ (a neurological disorder), when they may have instead been suffering from sleep deprivation, as they will result in similar symptoms, with the horse suddenly swaying or collapsing, and potentially injuring (particularly fetlocks, knees, and the lips/muzzle) themselves in the process. Over time, sleep deprived horses may also become hyper-vigilant, irritable, be dull/drowsy, lose weight and have decreased ridden performance.
So why would a horse just not sleep?
👉 Pain – particularly horses who have multiple arthritic or painful limbs, and feel worried that they may not be able to rise after a prolonged period of lying down
👉 Environmental discomfort – for example, a too small stable, or lack of bedding
👉 Stress – moving yards or issues with herd dynamics can both result in reduced sleep
👉 Disturbed sleep – busy overnight environments, such as stay away shows or hospital stays, can result in horses not sleeping
How to help a sleep-deprived horse:
Using CCTV monitoring can help determine whether a horse is lying down to sleep. If sleep deprivation is suspected, consider the following solutions:
✅ Pain management – Provide joint supplements, pain relief, or other veterinary support.
✅ Comfortable environment – Ensure an appropriately sized stable with ample bedding.
✅ Reduce stress – Keep routines consistent and provide a calm, secure setting.
✅ Quiet night time conditions – Minimise disturbances by turning off lights and reducing noise overnight.
By addressing these factors, you can help ensure your horse gets the deep sleep they need to stay healthy and perform at their best.
If you need any help with a sleep deprivation then don't hesitate to call us on 01772 861300.
