I've worried about my snakes getting injured but what I decided to do was just feed them many smaller live prey items or just pre kill the live rat altogether.
I have 14 BPs all eat live and none have ever been injured.
Ive noticed when they're really hungry, they waste no time in striking and usually always grab the rodent within seconds of me dropping it on there except for my enchi gravel that jerk will only eat prekilled if he's not being watched.