My girl just hit 200g, loaded and she gets small adult mice (around 25g). You might want to get a few more opinions on that prey size. Or, do a search on prey size. There are some pretty good posts about that subject. I've heard that you don't want too much of any of a lump. But, I could be wrong.

Could she be coming up on a shed? I understand that they can have an attitude when they go into a shed cycle.

Either way, GOOD LUCK!