Iv actually been lucky. All 6 of my BP's sit at the top of the tub waiting for me to open it. Tho i do give the room a good pre-scent so it gets everyone and feeding mode. Its like teasing BP's Give them the smell of food and let them sit there and take in the smell of dead rodents YUM! Gets mines in the perfect feeding mode

As for the boas.. Well it doesnt matter if i pre-scent or not u just stick it in there they will take it no matter what rofl.