Ok so we have had 4 healthy hens for 2 months now. We got 2 new hens a few weeks ago. Everything has been fine. Then I noticed a hen sneezing a lot. And a week later I noticed one of the new hens have clear liquid from her nose. I put her in the kennel. After a while her nose was dry. So I gave her back her water and put her back into the flock. Today my older hen started sounding raspy. Making weird sounds. And now another one tonight. We have been doing a lot of work in the coop this week. It has been dusty. And I added DE in there food yesterday. Did we possibly make this an issue or are the newer hens making my older ones sick? We have a dirt floor in the coop. It has been dry and warm during the day but also getting chilly. I dono what to do. If we treat them I know they just will share it to my baby chicks at some point. There in there own coop as of yesterday. We worry there infected to. Anyone got any advice?? Thank u! Oh and we free range them.