I have made earlier post about my sick chickens. I had one hen die apprx week ago. I had 2 roosters sick so I quarantined them . I am treating the whole flock with Amprid (corid) . The one rooster was feeling better today and poop was solid again so... I let the rooster out of Q . I left to come back to him dead comb turned black and covering his face . Seemed to have lots of missing feathers on his side . My other rooster is only barley outside of his Q area and only laying there , i walked all the way to it and still no movement , you can see him taking his breaths . Please help what has happened to my chickens ?