If your girl is getting lazy about eating she may also not be all that hungry, so you may want to extend her schedule. If you're offering every seven days now, push it out to 10 or 14 days, and see if there's a difference in her behavior.
I have a male doing that, though he's on f/t - he hits the rat, holds it a while, eventually he'll throw one lazy coil around it, "kills" it, and then leaves it.
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