Has she eaten well before (with whoever you got her from)? Is she losing any weight?

When my snake is fasting (as he currently is) he sometimes has the behavior of seeming "scared" of the f/t rats. He kind of looks interested for a few seconds before darting his head back and hiding. He'll do this for a few weeks straight before finally accepting food again. But normally he's a very good, bold eater. Of course, he is an adult so it's safer for him to fast for longer than a baby could. That might just be your snake's way of showing that it isn't hungry or interested. I think your snake is probably okay unless there's more going on like weight loss or signs of sickness. They're known for being picky, fasting, etc.

Someone who's more experienced with picky eaters might have more to say... My bp isn't picky at all and only goes off of feed a few times a year for very short periods of time. Good luck!