Help! I've been reading all the threads I can find about chicken respiratory diseases, but I don't have any standout symptoms - they're just kinda... blah! The story is: I had 4 adult hens, anywhere between 1.5 and 3.5 years old, doing fine. Never been sick. I bought 4 pullets from a local lady who was basically just hatching out 100's of chicks .. there were pullets running around everywhere! I pointed out the 4 I wanted and a guy caught them with nets ... interesting experience. The 4 young birds displayed no signs of sickness. ADMISSION THAT I'M TERRIBLE: I've had good luck in the past and I didn't quarantine. Nor did I understand at the time what my husband and I could be tracking home on our boots/clothes/etc. So, lesson learned I'll definitely build a separate pen next time and scrub outselves and -burn- wash the clothes. So, all 8 birds are socializing, they're mixing it up. This is in early August. Not long after that, my favorite bird Dora starts acting weird. Essentially she just grows more and more listless - I notice when she doesn't come sprinting for scratch. After a day of being down in the dumps I find her sitting in a next box just wheezing. Her beak is snotty and her comb is totally drooping down (normally tall and proud). So I bring her inside and set her up in a wire crate kept for such occasions, not that I've really used it (previous sick bird experience was a fainting Polish). She's not eating, and hardly drinking. Sneezing/coughing a bit. I get some water into her with rooster booster (not medicated) but she's so glazed over I'm not convinced she'll live the night. But she does! So, slowly but surely she recovers back to eating some mash and scrambled eggs, and crumbles, and the enhanced water. Probably about a week I let her back out, and she's sort of weak, but quickly recovers her strength outside running around. Yay! Saved hen! ... cut to september and a lot of the flock seems to have a very mild version of what she did. A few of the 4 young pullets are .... well, it's more like a hiccup than a sneeze. They randomly CHERP and look a little surprised. It doesn't seem like a sneeze, but I don't know what it is. And my matron hen Abigail has some rales. She is also molting, so she just looks miserable right now. There are no signs of : extreme lethargy or lameness. No sores or spots. Sometimes someone's eye seems squinty or swollen but the next day it's fine and bright and clear. I don't see much snot, if any. I don't see the open-mouth choking or gagging, or head shaking. Zero egg production from anyone (but with one molting, and 3 juveniles, it would be low anyhow). Also a predator attack took out Dora after I brought her back to health so everyone is shook up about that. So the lack of any show-stopper symptoms, I'm not sure what's going on. The table/checklist for diagnosing is just like ??? I'm not sure how to treat (antibiotics in the water? medicated crumbles?) and since I don't know what's going on, I don't know if this is one of those "will always be sick and will infect any new birds coming in" kind of things. Obviously I don't want to cull if I don't have to, because this seems so inconclusive, but I will if I know it something bad.