If the crop is not emptying, then I would treat according to the article linked below.
https://www.backyardchickens.com/ar...w-to-know-which-one-youre-dealing-with.73607/
His poop is not normal. Can the vet do some testing on a sample for you?
I'd try to encourage him to eat his normal feed. A bit of egg, fish or meat as a protein boost. If the crop is not emptying, make sure he's drinking.
https://www.backyardchickens.com/ar...w-to-know-which-one-youre-dealing-with.73607/
His poop is not normal. Can the vet do some testing on a sample for you?
I'd try to encourage him to eat his normal feed. A bit of egg, fish or meat as a protein boost. If the crop is not emptying, make sure he's drinking.