Hey guys, it was definitely sour crop... the liquid was really yellow and smelled like raw eggs/sulfur today. Unfortunately she died just now, poor thing. I'd had her on ACV water all day and was just getting some liquid out of her crop, and some chunks were finally starting to come up, but I think she aspirated.
He crop turned blue suddenly, and she shook her head and started shaking a bit, then started struggling. She was also so skinny by now, too. Poor poor chick. Fortunately it all happened quickly, so hopefully she wasn't in too much pain, and now we have her buried under the lilac tree with other past chicken friends.
So sad, but I really feel I did all I could for her, I just think it had been too long until we could get just the ACV water. Ironically we found a vet with chicken experience... just as bitterly ironic, he's on vacation for 7 days. But if this happens again now we know where to start. Thank you for all your help! Her name was Amber by the way... given to her just earlier today. I hate that you get so attached to them when you're trying to keep them alive... ugh, Vet school is going to be a long hard trial of getting used to this, if I even get in.
But then I'll be able to help other chicken lovers out there, and not charge them tons of money, either.
Oh well, she lived two years of a pretty darn good life! Hopefully I will never have to see something like this happen to one of my birds again though...
Once again, thank you everyone for all your help!