It was believed, and I think disproven, that bp's will be trained to think that every time you open your cage, it's feeding time. There's been a number of people around here that have not had that problem, me for instance. I fed inside the cage as well as in a box and noticed no change in aggressive behavior when the cage was opened.

Are you feeding live or p/k? If live, just drop him in and watch the feeding, make sure everything goes OK. If p/k...I would usually remove the hide (if he was in the hide) to wake him up...and then dangle the mouse/rat in front of him..and he would strike and eat...when he was done i would carefully scoot him over, put his hide back in where it was, and then he'll normally find his way back.

I can't help but use Adam (8 bp) as an example. He feeds hundreds of snakes ever week inside their enclosure and As far as I know, no problems have come about.