Table 1.

Ethogram of behaviors exhibited and recorded during video observation in Study 1. Most behaviors were the same in Study 2, but some were divided into two categories.

Behavior Exhibited	Study 1	Study 2
Sternal recumbency	Lying down on breast with head up or nose on bedding, legs under or next to the body
Lateral recumbency	Lying down on side with body and head on bedding, legs stretched out
Standing rest	Standing in relaxed state with head lowered/ relaxed ears/eyes closed/one rear foot slightly elevated
Standing attentive	Standing with open eyes/ears pointed forward /head upright or eating	Standing with open eyes/ears pointed forward/head upright
Foraging		Standing with nose in bedding or eating in the single box or the lying hall
Active	In motion (including walking, playing, urinating)
Walk		Walking
Other		Playing, urinating, human interaction (i.e., horse being tied up for mucking out)
Not in lying hall	Outside the lying hall with whole body or only the head
Not in active open barn/box		Removed from active open barn or individual box