I would agree that the biting, especially with coiling, is a feeding response. And if the previous owner didn’t handle her. Did the previous owner feed it in its cage? Was the snake removed from its enclosure for cleaning, and if it was, did the ex-owner feed it then?
I am just trying to establish if the snake likely associates being removed with feeding. If so then you need to change that association if you wish to handle your snake without it biting. What you do to change this depends on what associations it has developed and how you want to go about feeding and handling.
Just for example, you might choose to always feed it at night and only ever handle it during the day. You might also use the snake hook always and only to only to feed it and always use a pillow slip over each hand to remove it for handling. Once the pattern is established and you are feeling more confident, then then you can lose the non-handling arm’s pillow slip and let see if it will glide into/over the hand without a slip. Don’t try and force it. Just give it the opportunity, taking it slow and steady and not expecting things to change overnight, especially with a snake that sounds like it has never been handled. Whatever, it is very important to be consistent and exercise patience and persistence.
As for feeding, an adult Stimmie will take two or three adult mice in a feed. So you may find it easier to do that and let it choose how much it wants to eat. That should satisfy her for a week and a half to two weeks. She should not need to be fed much more often than that.
