Should I be worried?

[B.P.'s 4me]

I'm hoping someone can EITHER offer suggestions, or reassure me that this is normal, but I'm confused.
A month ago, I purchased a hatchling b.p. (August /17 hatch) from a local, and reputable breeder. She was in excellent condition (weight 196 gms.) has been eating f.t. with enthusiasm. (once a week) and has gained a bit every week. Originally I was feeding her rat fuzzies (12 -14 gms.) but was advised that may be too small so increased to small rat pups. The first was 18 gms. which she accepted well, but my supplier didn't normally carry that size so the last time I fed her (Nov. 19) was a 20 gm. pup, which seemed to be no problem. However, that was the last thing she's eaten. She did have a shed a few days later, but since then, has been very active and behaves like she's hungry. Last Saturday, I offered her a 22 gm. pup (which is all I had) which she struck immediately, wrapped, held for about 3 minutes, but instead of eating it, she moved away and wouldn't take it. I left her until last night and offered a 16 gm. pup and she did the same thing. She struck it before it hit the floor of her enclosure, coiled around it, waited a couple of minutes, did a lot of sniffing and really looked like she was going to eat it, but didn't. Her current weight is 224 gms. so she has gained since she's arrived but has been at that weight since Nov. 23, so THAT is a deviation from the norm for her.
I get that b.p. can go for periods of time without eating, but if she wasn't hungry, would anticipate that they simply wouldn't show interest. Why is she striking and acting hungry, but refusing to eat?