I would feed any true BCC from Suriname or Guyana mice for the first year of it's life.
I have a friend here that has 2 beautiful Suriname BCC from Gus Rentfro. He finds them a bit more timid/less social than his Argentine boas but by no means defensive.
Years of selective, captive breeding, knowledge and improved caging have made BCC boas much easier to care for.
THE COMPLETE BOA CONSTRICTOR by Vincent Russo, and anything written on the internet by Gus Rentfro are excellent sources for the care of boa constrictors.