While your point is fully relevant AMD makes perfect sense, the rats that bite are the ones that are hungry and left unattended. I always (I don't mean go sound like a monster) watch my snake kill the rat. I usually feed f/t but sometimes they just won't take it. If the snake grabs the rat by the rear end, take something metal or solid and give the rat something to bite on while it's being suffocated. That sounds bad in text, but it really works. It's not my favorite way, but I'd rather have my snake eat and do so safely. Do not EVER leave a live rat that has it's eyes open unattended in a snake cage. EVER.