I have a small flock of 6 chickens they are Isa brown.
I have had these birds for about 3 years now. They have a big yard are well fed etc.
I have noticed lately that one of them has seemed a bit quite for about a week but for the last couple of days she has been staying onside the hen house. I went inside to look at her she didn't show to much resistance for me to catch her. At first I couldn't see anything wrong, so I put her back down and gave her a small piece of bread. When she tried to eat it she regurgitate it back up with all this green/black slime and tried to eat it again.
You can see she is jerking her neck and head trying to shake this stuff out of her throat and jerking her neck looking like she is trying to swallow something.
I have read about sour crop and impacted crop but I'm not sure what is going on with her.
All other birds look fine. She has no discharge from her eyes.
Please forgive my writing I hope that all make sense.