My wife and I have tried for almost 2 weeks to help this R.I.R. sour crop her neck and chest are Hugh we have isolated her from the other chickens gave her vinegar in her water.we gave her yogurt also put veg oil down her we have even held her upside down and drained her,very nasty liquid came up. I can't seem to save this one we have rubbed her neck to help her get it up please help if you can. we did finely put her back with the girls after she stopped eating all together we have never lost a chicken before since we started taking of them but she is just sitting around I am very worried she will not make it much longer I feel she is suffering and don't know what my next step should be.thank u all..