What was your handling regime when Wallace was younger?
For the first year he was handled several times a day even if it was for 30 seconds each time. I've done things a little non-standard with him. He was never hook trained and has no clue where his food comes. Typically I will open his enclosure and let him out to roam. When he isn't looking his food goes on top of his hide and he has to find it. Sometimes on days he isn't to be fed he will come out make a lap on the stack then go back to his enclosure hoping to find food and he will do this 3-4 times.
Still no pushing issues with him but he does poke around at his door. Normally he is content on just having the door open and resting his head on the litter dam but sometimes he will perch on top of the stack for a few hours and occasionally he will want to roam.