Feeding in the enclosure will NOT cause your BP to become aggressive. I have 17 currently, and everyone eats in their respective tubs. I have not issue taking them out the next day or any other day, by hand. In fact, you put yourself at greater risk by picking them up out of a feeding tub when they might still be in feeding mode. If you think about it, you probably open that cage to handle him more than you do to feed him, so a conditioned response would be to assume it isn't food until he can smell it. Some of mine are fed more often than they're held, and I still have zero problems.