I plan to start keeping mine outside starting this spring, and this is my absolute greatest fear. I think they are smarter than we give them credit for sometimes. If it was stolen, then of course that's an entirely separate issue. I hope to God you find him!!!His night box is always the spot he returns to, and on the rare occasions he does get to go to a different yard (which has not happened recently since he was given a whole yard to himself), he would just sit and graze