Carrie, I keep some extra virgin Olive Oil here just for cooking and I know it's very nutritious oil, but I think even just veg oil would do in a pinch. It was very interesting that when Ruby was eating that oily, milky cornbread, the milk would pool with little oily puddles in it and she'd slurp up that oily milk like she really knew she needed it. So, it may not be a miracle cure, but in this case, it could very well, at least in part, be somewhat a case of sour crop, if not impacted crop. She is still weak, but so much more alive-looking today than the last few days.
Stacey, sorry, I missed your question about the lone egg in the bator. It's still moving and squirming, but making me wait. I have a name in mind for that baby, but I really hope it's a pullet. Not sure I have a place here for a bearded Barred Rock rooster, LOL.