Lol Yup, nothing to worry about there. As was said, DO NOT pull stuff back out of their mouths. As for a potential reason why she decided to go for the rear, I've noticed that my snakes seem to be more inclined to try backwards when the prey is on the small side. You might be due for a size change, but some of them just eat backwards for the heck of it, so as long as she eats I wouldn't worry.