I know i feed live to my adults because that wont take anythign else but have you tried f/t or prekilled to perhaps prevent a bite ? I have to tend to my adult boa every once and a while and it can be a pain espically if shes still in feed mode half to be very careful. but with live im always keepin close eye because of that. i had one incadent a few weeks ago where the rat lets just say basicly explained to my boa about what it thought about being and no it wasnt a bite lol.