Hi Hogmeister
Love the idea of a spare bed!
Alternative suspects for moving bowls around are birds. I sometimes leave the bowls out for the birds, if the hogs have left anything, and they are often moved around then. i.e. starlings, jackdaws, etc. They do visit early in the morning, too, so when no-one is around to see.
Some hogs seem to be very clever at tipping bowls over by standing on the rims, even of ceramic, straight sided, shallow bowls. (they sometimes end up getting a facefull of food!) but the bowl is usually moved in the process. But they are also good a looking underneath things – maybe stones to see if there are any beetles, etc. underneath, so moving/tipping over bowls is hoglets play!
