I have a young rooster that was making a noise like a hiccup or like if a person would cough. Then he opens his mouth. The chickens have been on a very fine ground egg layer. I separated him last night & put a lamp on him & gave him just scratch grain. He has no drainage, pus, looks fine. I read on here about gaping being worms. He is the only one doing this. I wonder if the dry feed has cloged his throat ? Please let me know what you think. For now, he is separated.