Jess, from my very limited experience in colubrids (we own just one - a milksnake) I just don't think they are the efficient constrictors that our boas and ball pythons are. I'm much more conservative with live feeding our milksnake as I've noticed while she is able to constrict, she will also slam prey against things, physically squish prey or simply if the prey is small enough, eat it fully alive butt first (very gross). It's funny but of all the snakes in the house, the smallest cutest prettiest colored snake is the one I really don't like to watch eat. She's just not the efficient, quick predator the others are.