Hey, congrats on getting a rabbit. (I was trying to find one for you after seeing your older posts, I'll stop looking unless you want to get her a friend).
You can give her alfalfa mixed with timothy and see if that helps.
Fresh, clean (no wildlife, pet pee or pesticides) grass is also a good option. Once she's eating that, you can dry some and then gradually switch to hay.
Breeders who have rabbits on all-pellets diets are always a problem, really hard to switch to a proper diet. Having another rabbit that is used to a variety will inspire the first rabbit to try other things, but they tend to stick to what they grew up.
Pics would be nice! Is she a lop?
sas :bunnydance: