Please help! I just realized that my chickens seem to have caught some kind of respiratory illness; when I pick up most of them they make a bubbly sound when they breath and I can feel it in their lungs. Then many of them have discharge and dust drying onto their nostrils and when I picked some of the gunk away they had this awful, rancid, infection like smell and one of them had mostly clear fluid come out. I've also noticed that lately there seems to be more runny poop and diarrhea then normal. I am at a total loss as what to do since I was going to downsize my flock but then this popped up, and then with the new medication/drug laws I'm not sure what I could get for them, or even what they have or how to treat it.