One of my pet rats found his way into a small hole in the wall and he's really shy its under a sink, he can't go anywhere he's surrounded by drywall and wall studs but since he's so shy he won't be coaxed out by food if I'm in sight. I have tried the dangling a tube with peanutbutter over a tall bucket and using a jar and nickel won't work because he may be small but not that small... help