I feed my little boa frozen small mice. Live food can be dangerous for snakes. A mouse or rabbit can actually cause serious harm, even kill a snake sometimes. People have often thrown rats in with snakes and left to come home to a half eaten snake. If it not necessary at all for the animal to be alive. Responsible snake owners will at minimum stun the prey animal in question before feeding the snake. I really hate when I hear about people feeding live chicks to snakes.
Working at a pet store I sold an anaconda once. That thing was mean as sin. It started to try and crush my arm as I took it out for the buyer and I manged to knock it to the ground where it started to chase me when the new owner grabbed its tail. *Shudders* Crazy! Crazy! Crazy!!! I do not know if permits are required for the giant snakes.
Mine (Will not get bigger):


Mine (Will not get bigger):