I suspect my 6 week old cockerel has sour crop (I think). I never experienced it though. I went through some internet searches last night and found to massage the chickens crop, which I did. I just want to know if their is anything else I could do, why he has no symptoms, and what caused it. 2 Days ago I let them free range for a couple minutes They get their water cleaned He eats a lot His crop WAS mushy but his breathe didn't stink and I heard no sounds from the crop.. if that's suppose to happen? They get fed chick GROWER and cracked corn once in a while He is an Asian black and he is HUGE for a 6 month old, he is HALF the size of my 4-5 month old!