OK, so I know I don't have any mold problems....been VERY careful about that. I did get a few new chicks from a breeder....maybe brought in something with them. The free ranging adult hens (only 8) were all so healthy until this "cold" (to use the word loosely).... now all the chickens seem down with it except for 3. Just not their peppy selves! Poor babies! The little sick chicks seems to love the boiled egg yolk and water combo I gave her this morning....thanks for the suggestion. She seems a little better today. I know she is lonely and misses her flock mates, but will have to wait a while longer. I am hoping this is all just a casual respiratory thing and will pass soon without deaths. I love all my little chickens. They are like pets to us. My Barred Rock is one of my husbands favorites as she loves getting in his 4 wheeler, and on his tractor and into any car that has its door opened. She just loves vehicles! If I believed in reincarnation, I would be betting her previous life had something to do with cars! hahahha....
Also, I am very careful about a clean coop and run. I clean up every few days and use DE a lot. Also, they free range so not really in any one place for long. So, I will continue the yolk thing, may add some Apple cider vinegar to their water and will get some more yogurt, too. Will watch and see.
Thank you all for your replies! I don't know what I would do without my BYC "friends"! I don't know anyone else with chickens to talk to...so thanks again! Will post how it all turns out!