I've got a couple that will never strike at anything no matter what I do. I pretty much just have to leave the F/T rat/mouse in their tub and check again in the morning to see if they decided to eat.

One of my pickiest females is like this and is a total mouser to boot. She is incredibly shy and once spent a couple of hours outside of her hide because a rat pup had taken up residence in her hide. Just turns out she has absolutely ZERO interest in rats whatsoever! Frustrating when you'd like her to put some size on.

Amazing how each snake seems to have their own distinct eating personality!