One of my chickens has been sneezing a bit for the last few weeks, and after some research i got some anti biotics from the vets, presuming it was a CRD (she also had a little water/foam in her eyes at night.) However the course has now finished (all 10 of them were having tylan in their water for 5 days but then i found out the individual daily dose and fed them it individually as i heard that that was more effective, none of the others were showing the signs, except some of them started sneezing AFTER the treatment started,) and she seems exactly the same. For the last two nights though (tuesday and wednesday, anti biotics were stopped on monday) she has been looking REALLY ill, to the point that last night i thought it would be fairest to have her put down this morning. She was breathing through her mouth, her eyes were closed, despite the fact i was shining a torch around and talking to them, and it seemed that she was having the use the top part of her neck to breath; i don't really know how to explain it, but basically the part of her neck right underneath her head was expanding/contracting as she breathed. She looked awful. So i spoke to my parents last night about taking her to the vets this morning, most likely to put her to sleep as i know CRDs aren't curable and as soon as i knew she had one, it seemed like a possible result. But this morning, as with every morning, she's fine- flying out as soon as the door is opened, eating more food than any other chicken, hopping all over me and trying to fly out of their field to get their breakfast first. Because of this, my parents are refusing to believe there's something wrong with her and will not let me take her to the vets. I ADORE my chickens but for some reason they don't seem to take into account the fact that i have researched a lot more information on this than they have and refuse to believe that i'm right. Putting her down is obviously the last thing i want but it really does seem like the fairest thing for her (or it did seem like it, until my parents guilt tripped me.) So right now I'm kind of looking for information about why she is like this at night. I figured that because she's ill, she's weaker and may have picked up some other kind of illness too. It rained all day yesterday and was pretty cold, could that have influenced it? Also, they live in an old caravan (converted to chicken use, of course,) it's clean but i guess there could be some kind of damp or something irritating her? They're the only factors i can think of which might be a problem here. Apart from the occasional sneeze, the other chickens have been absolutely fine, until this morning one was fluffing herself up and showed no interest in their porrige (i give them this with extra supplements in to restore their condition and general health because they're ex farm hens,) but she showed no other symptons, yet i noticed she weirdly kept on looking underneath herself.. I don't know if this is related at all but i thought i should mention it, she still looks a little off but i have just thrown some corn around for them and she ate some so who knows... I DON'T KNOW WHAT TO DO! could i get more antibiotics, and start another course? (they only had them for 5 days and 2 or 3 of those days they had it in water so it probably wasn't too efffective) should i demand to get her put down? (i was so sure it would have been the right thing to do but my parents made me feel awful about it) my local vets don't seem to have much knowlegde on chickens, i could perhaps speak to another? should i see if there's any improvement, change where she sleeps, make her warmer at night, give her anything else? I'm so so so confused right now and would appreciate any advice, so thank you! oh and the chickens, i guess, are brown hybrid layers from an egg farm.. i don't know the specifics. They're between 1 and a half years old or 2, and I've had them since November 2010- I work on the farm which i rescued them from and so there's a possibility of me speaking to the farmer there about it.. I also have 3 bantams who live separately and i've had for a lonnnnggg time, they're pretty old and are showing now problems what so ever.