Feeding troubles!

[Zoe]

I am going absolutely mad trying to get my female IJ to eat rats... She is large enough to eat 10 mice a sitting, which is irritating because a) she eats slow! b) my mice supply is drying up, and buying 10 mice is bloody expensive c) she is eating more bone and fur than meat and fat.
I've tried scenting, thawing a rat with a mouse, a live rat pup and chain feeding. Nothing works. When I chain feed, she vomits the mouse and rat. When I scent, IF she strikes she drops it right away.
Does chicken broth really work? How about chicks, might she like them? I am really getting desperate, I'd like to be big enough to breed next year but at this rate she'll never getting bigger than 4ft!

Thanks!
Zoe