Exactly why I mentioned that I would have tried live a long time agoIt's good she's not loosing a lot of weight and that you're monitoring her weights regularly it sounds, but she is defiantly way too small for her age IMO and I would be worried as well. I would try live with her, a rat fuzzy perhaps - something that you can safely leave in with her if need be, and see how her response is. If she eats that way (ie on live) and becomes established eating regularly then I would try to go back to F/T.