Eating backwards

[OoohShiny]

My smaller BP, Tonks (chocolate enchi female, about 120g), has a weird habit of eating her mice backwards, and she does it so often that I'm now starting to think she's doing it on purpose. According to my records, she's eaten her mice backwards more often than she's eaten them head-first (I always stay nearby and keep an eye out in case of problems, but she manages just fine).

Today I offered her her mouse, she grabbed it by the head (she's a VERY enthusiastic eater, I love it!), and I thought Yay, she'll eat it headfirst this week! Then I watched as she very carefully worked her way from its head to its butt, and ate it backwards. I am now convinced she's doing it on purpose, lol.

So my question is, how dangerous is this? I always watch as my snakes eat, since Ana Gwyn got a piece of substrate stuck in her throat the very first time she ate for me and I've been nervous ever since. But Tonks really does seem to swallow her mice's butts without much trouble. And is it possible that this is a weird preference? She's also my BP who never sits in a hide but prefers to hang out right in the open, and is most active in the 1-2 days after eating instead of sitting quietly and digesting (I just fed her and she's now starting her third lap around her enclosure), so maybe she's just backwards all around.