I feed live if I have it, because it's more natural and that is what they prefer. That's all the excitement they get besides being handled which they tolerate and feeding day is their favorite day of the week. In most cases where a snake was hurt by a rat it's because the owner didn't watch and probably just left the rat in with the snake and walked away. If you know what you are doing and supervise the whole process, you can even hold the feet back so they don't get scratched, then there is little to no risk.