Ugh . . . I've got one very sick chicken. Respiratory illness . . . . the hen is completely congested. The cough is very wet, when she coughs. Also she's having trouble breathing. She is breathing with her beak open and is making a wheezing noise when she inhales and exhales. She's been separated from the flock. But I've noticed that one other hen is coming down with the illness. I know that she needs medication at this point. But which ones? Does anyone have suggestions please.