I'm very sorry. I haven't had a lot of experience with chickens so far, but I did have a hen a while ago that her crop was very large, several days in a row. For a couple of hours I alternated holding her upright then upside down while massaging her crop. Oh, I had given her a little olive oil first, it was supposed to make her throw up. All she did was burp a lot. I was afraid I'd find her dead the next morning. She's been fine.