22/10/2026
What difference does bedding depth make to horse rest?
While several studies have examined how bedding materials affect lying-down behaviour in stabled horses, the role of bedding comfort in shaping resting and lying behaviours remains poorly understood.
This study investigated how the depth of peat bedding influences sleep- and rest-related behaviours in individually stabled horses.
The researchers studied 16 healthy riding horses, each kept in their own stable. Every horse spent 21 days on each of two peat bedding depths, 5 cm and 15 cm, so they could be compared with themselves.
Horses were filmed every night from 4pm to 6am. The researchers analysed how often horses rolled and lay down, and how long they spent in different lying postures. The analyses also took into account the horse’s height and their behaviour before the study.
Deeper bedding was associated with longer and more frequent lying down. Horses spent about twice as long lying down on 15 cm bedding as on 5 cm bedding (70.9 vs. 35.6 minutes per night).
They also lay down more often (1.9 vs. 0.8 times per night). The effect depended on posture. Deeper bedding increased time spent resting on the chest with legs folded underneath (sternal lying), but not time spent lying flat on the side (lateral lying).
How horses held their neck while lying down stayed largely the same. Horses also rolled more often on deeper bedding.
Lying behaviour also varied between the two study periods, suggesting that factors other than bedding depth played a role.
The authors conclude that deeper peat bedding in individually stabled horses increases lying down and sleep- and rest-related behaviours, and also encourages comfort-related behaviours such as rolling.
Bedding depth is therefore an important environmental factor influencing equine resting behaviour.
Limitations: The study involved 16 horses, two depths of one bedding type, and night-time recordings only, and lying behaviour also changed between study periods, so the results may not apply to other bedding materials, depths or housing systems.
You can read this paper here: https://www.sciencedirect.com/science/article/pii/S016815912600287X