Where do the horses go........at night?

If you have a traditional barn that question is probably very easy to answer.....they go into their stalls. But my horses live a more natural life they have a 3 sided run in shed and about 3 acres of fenced paddocks to roam. But from sunrise to sunset whenever I look out the window, day after day, there they stand.... always in the same place, in front of the run-in eating, sunning, and sleeping. Even after dark, when I flip on the spot lights to check on them they often blink their eyes sleepily from the protection of their run in shed. But take a walk in my pastures and the hoofprints in the snow tell a completely different story. Under cover of darkness my horses are explorers, they patrol their fence line down in the woods and weave their way in and around the thick pines. Even after a snowfall, with depths over a foot, their tracks are evident in the fresh snow. Sometimes they find a fallen tree, perhaps this is the reward for the effort, the opportunity to strip bark off a fallen hardwood, maybe they just like taking themselves for a walk. Whatever the reason I realize now I need to check that fence-line as often as they do !