Over the past 8-9 months I have had 3 of my six chickens die. They all have passed (i believe) of similar causes and I think one of my last few is getting sick as well. Rosy's having trouble breathing and is making a gurgling sound sometimes and she often sneezes. I think she either has a breathing problem or the flu and I'm not sure what to do with the poor girl, I just want her to get better. Can anyone help me?