"Key signs of loneliness like restlessness, loss of appetite/weight loss, and stress behaviors like kicking, cribbing, calling, and sweating can all be signals of stress from isolation."
"...understanding horse behavior is essential to prevent issues like depression in horses and stress responses caused by feeling alone or social isolation"
"You can tell when your horse is withdrawn, as it will tend not to respond to things around it."
"If your horse doesn’t have a friend to keep it company and its mind occupied, it may show these bored, restless motions..."