I haven't heard of BCA being that much different than other locale specifics. I have Hogs, Argentines, Colombians and Dumerils that all pretty much behave the same as each other. That said, I never tell any of my customers to feed a normal meal for the first meal. The boa is stressed from the move, the ship, the new setup, the new environment and etc etc. The last thing they need is a massive meal to digest during all that. I usually tell people to feed a smaller meal for the first meal and then wait a week to adjust the boa to their feeding preferences. I would monitor him very closely, but do not add anything to stress him out to already compounded stresses. I would also be ready for a regurge as a worst case scenario. If this happens, leave him alone and do not feed him for 2 weeks then feed him a small meal and wait another week to up the size, and so on and so on, until he's up to a normal size meal. I really don't know why anyone feeds a boa two rats and/or mice at a time. All you have to do is wait till they poo to feed them again and they will get the same nourishment with half the stress. That's just my opinion though, take it as it is.