I've done the whole feeding in tub versus out of tub with numerous corns over the years out of curiosity. Some are smarter than others and don't condition so much. I have also seen quite a few that, when fed in the tub, will go into feeding mode the moment I open it up. Those are corns, however, and they have a much stronger feeding response normally than bp's do. With my bp's, I'm too worried about them going off food to take them out though I have one who will crawl out of her tub and go choose her rat right off the plate. Shy isn't in her vocabulary where food is concerned. May have to experiment with her...