Hey there, don't feed her marrow, with an upset tummy it's a bit rich and fatty and won't help the healing process.
Slippery elm root
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Keep the water that you are boiling the chicken in, don't cook anything in the microwave, feed that to her, make sure she's drinking it. Make sure you are giving her some kind of probiotic as her insides need to heal and maintain a healthy flora.
My question to you is are you planning on feeding raw or home cooking as not many folks talk about natural holistic items like slippery elm.
If you are then my next thing to suggest would be, buy some whole chickens, but them into about 4 pieces bones in and let her chew on that, observed of course. The bones will actually help bind her poops. You can PM me if you want.