one of our chickens started getting sick about 2 weeks ago. she acted like she couldn't breathe, and sounds like she has something caught in her throat. we have given her baytril injections, and some times she acts better and will eat some, but then gets bad again. she doesn't have any unusual discharge from her eyes or nose. just sits with her mouth open and tries to get her breath. she has lost a lot of weight and doubt she is going to make it. thought someone might be able to tell me what is wrong with her. she ate some raw egg with bread in it today. isn't drinkin much. appreciate if some might clue me in on this one. thanks.