I had a hen that died last night while sitting on 8 eggs... 1 had hatched but also died, not sure if it was because the hen was cold and the chick died from that or I discovered my hen had a ton of mites on her and it is possible that that was the case of death and could my chick have dies from...
Did you ever find out what was wrong with your chickens? Mine have the sneezing and a little gurgling but they are very active and eat good. I don't know what to do, I have been treating them, but not sure if it is helping!