Push hay, hay, hay! Timothy hay is best .. but babies can have alfalfa. Bo couldn't but that's my Bo! he is allergic to alfalfa and HATES strawberries.... not the normal bun.....
Anyhow, hay is like the best thing in the world for them IMO... along with a good pelleted feed (like Oxbow) ... If mine are the slightest bit "off" i give them more and more hay.... I added some orchard grass and botanical hay for them recently just to encourage them to eat more of it - molting season is upon my house!
ALSO: does she sleep in her litterbox? several of them do - Bo does now and then and PEEEEEEEE U!! he stinks when he does!