SHHHHHHH don't let my Kaiser know he should know how to get out of his crate. I suppose once they have escaped they will always have a go at doing it again. What a good solution to solve the problem getting another B, maybe Kaiser should escape. As Kaiser gets older I intend to test him being left out of his crate and hope he behaves as I always worry that if there's a fire he will be trapped.
I'm convinced they smell/sense something from previous occupants - my previous beastie initially peed on all the spots the previous owner dogs messed (they were slightly discolored so you could tell) and the same thing happened at my brother's house - even though he twice scrubbed his carpets.