Thanks to all of you at BYC - although I didn't get an immediate reply to my post, I was able to read a lot of information from you all. It gave me the courage to turn my chicken upside down for 10 minutes and gently massage her crop while I watched all this stuff come out from her beak. Boy, was there a lot of stuff in there! I'm pretty sure now that that is what it was - an impacted crop and what has made her front sore is that when she roosts at night on the hard crate, (I can't get them to roost anywhere else), her huge distended chest has been rubbing against the crate. Now she's walking around and pecking away with the rest of my flock and looking a lot less top heavy. I suspect I may have to do this a couple more times and I will move her to a softer roost situation.