What does a lonely horse think about when he stands still in a field?

A lonely horse standing still in a field might be thinking about where its herd or human companions are.

Horses are social animals, so if they're alone, they might feel uneasy, bored, or even a little sad. They could be scanning the horizon, listening for distant sounds, or waiting for something familiar to appear. Some might try to self-soothe by swaying, nibbling on grass absentmindedly, or just standing with their head lowered in a kind of quiet resignation. If they’ve had close bonds before, they might even be reminiscing in their own way, longing for company.