This morning my rooster, started making some horrible breathing noises, crackling a little bit, like he was having a tough time. My husband and I went to our feed store, where he owners know a bit about chickens. She said it was probably a respiratory infection of some sort and gave me a couple doses of an antibiotic that as of right now I cant remember what it's called, I think it started with a D. Anyhow, she said to give it with some egg yolk to him, and a bit in the water for everyone else. Not sure if that was good advice or not, but I felt good about it. Then I came home and noticed he did have watery poops, and like a green and yellow color. Not good, right? Could it be something wrong with his crop? No discharge from the nose or anything else yet. Everyone else seems fine and he is really acting normal. I have seen him drink but I haven't seen him eat anything. Help?