I place a tub of live rats in the snake room close to their racks. Then I go do other things for about 30 minutes. When I get back most are pacing the front of their tubs waiting for me to open and drop a rat in. They usually last no more than 5 seconds that way. If they are still in their hide (which I only remove for mating), then they are most likely wanting to ambush their prey, so I drop a rat in and go to the next tub. Within 5 minutes all 23 bp's have at least given their new room mates a big hug and are preparing to eat...