https://www.backyardchickens.com/forum/viewtopic.php?id=26414
here is a thread on eggbinding
You might want to look up ascites, too.
I am sorry I cannot be of further assistance.
https://www.backyardchickens.com/forum/viewtopic.php?id=310902&p=1
Here is a thread that appears similar to yours. I hope it helps.
https://www.backyardchickens.com/forum/viewtopic.php?id=340501
Here is another one.