I never thought I'd be the type to be writing this kind of question, but I've been reading through all the warnings on this site and now I'm wondering about the safety of my grown flock. I have 9 chicks, maybe 3-4 weeks old, in isolation in my husband's indoor shop. I picked them up from an unnamed petting zoo on September 6th. When I got them home and put them in the brooder, I noticed bloody poops within an hour. So I scoured this site and decided to start with Corid. As of yesterday, day four (?), there were still a few suspicious looking poops. One chick's feathers are not growing in well, and he's awfully tired looking. He along with one other are pretty small...could be age, but it seems more like failure to thrive. The one with the strange feathers seems to breath faster than the others, as well. Now, some of you may consider me a total dumb*ss for even picking these chicks up in the first place. I probably am. I made some observations at the petting zoo that didn't exactly register as dangerous when I was there, but after reading everyone's problems here, I'm concerned. The place was pretty clean, but the chicks were kept in a stall right next to adult turkeys. Any problems there? Guinea hens were in a neighboring stall. The adult chickens were kept across the yard. Most looked healthy, but one had many feathers missing off of her neck. Once again, my dumb*ss brain bypassed this obviously strange warning. Maybe it was because I had just seen some hens with feather damage from breeding in the next stall. I had picked up these chicks with the intention of keeping maybe two layers and using the rest for meat birds. Now I am not sure I even want to take that risk. I hate the idea of picking up chicks, looking at their little lives and then deciding to cull them. At least becoming a layer has honor, as does providing meat. Although, I'm sure many would be culled anyway from this petting zoo...you don't just hatch tons of chicks every summer for families to oggle at and then expect all of them to go on to happy chicken-y lives. It's just a sad fact. (He does this with other animals too....cats, especially.) I'm sort of mad at myself for supporting that concept by picking up chicks, but that's another thread entirely and there are probably many points of view to be had. Sorry to offend anyone, if I have. What are your points of view on culling chicks who are possibly sick...even though you may not have all the answers...in order to preserve your own flock? It seems awful, but then again, I really like my grown flock. Although I accept full responsibility for being dumb enough to pick the birds up to begin with, part of me feels like I shouldn't have to deal with this petting zoo's illnesses. If I do keep them, I know I need to quarantine for a month. What constitutes a good quarantine? How much distance do I put between the chicks and the adults? 20 feet? 40 feet? Thanks for reading if you've gotten this far, and thanks even more if you respond.