There are a few reasons the horses roll. To scratch their back. Also, the dust helps keep flies off. The other thing I’ve noticed about rolling, it’s a social event. When one rolls, others do too.
Chris’s Crema lays down to roll while Hope smells the pit and Winter waits for them. Ridgecrest walks up, shoos the fillies away, then Winter continues down the trail.
Ridgecrest lays down and begins rolling. Magnet stands near by. Pluma’s band has walked the trail and arrived near the pit. (*Note Denali up in front on the trail.)
Ridgecrest finishes his roll and gets up. He and Magnet watch Pluma’s band for a minute before the two studs turn and follow their band.