This kind of thing just happened to me with my pullet. I made her throw up the first night and separated her from her sisters with no water or food. Every once in a while I would hold her on my lap and massage her crop, I had to make her vomit a couple more times that night. I checked her crop first thing in the morning. I let her out of the chicken hospital and watched her walk around to see what her behavior was like (tired, listless, puffed or head pulled in). I then gave her about a tablespoon of coconut oil unmelted. Massaged somemore. Checked her pen for signs of poo or vomit. That night I gave her a small amount of water. Next morning when I checked on her she was mad. Pecking at everything and just griping away at me because she was lonely, hungry, bored and thirsty. I made her a boiled egg yolk with coconut oil. She loved it. I massaged her crop again. in the afternoon, I gave her a probiotic yogurt and water with...about an eighth of a teaspoon of ACV I her water. Played with her and then Put her in. That night I took the food and water out of the chicken house and let Hilde spend the night wither her sisters. Next morning I checked all crops and then gave water with a probiotic and some grit and chicken food with water. This did fix her impacted crop, and her sour crop, but I had to take her to the vet because it seemed like her crop just would not empty on its own. We found out that she has a hernia, so nice I have to make my girl a bra, but she is out with her sisters. I hope this help, even a little.