Well, more like a mystery. I went out to feed this morning and there were several bales of hay that had been strewn all over the ground and destroyed. There was also a pile of poo in the isle and one of the horse's stockings had been raided of all its cookies. All of the horses were secure in their stalls, no kicked in doors, and no busted stall guards. It was weird.
But then we saw that one of the bolts that held Levi's stall guard had been torn out of the wall and someone must have come after we left and put him back in his stall.
I watch too much SiFi channel. I watch that show on Animal Planet where animals experience paranormal phenomena and my imagination goes wild.
However, the original barn had burned down a long time ago and they just dug a hole out back and buried the rubble. We frequently dig up pieces of concrete and metal pipes that are remains of the old barn. Sounds like the perfect spot for some ghosties to hang out. ;D