I'm really kicking myself over having bought from a store that gave me a bad feeling but I drove way out of my way because they had the breeds I wanted and no where close did. I've since learned they are at least as bad as I felt. One of the things I noticed was a lot of the chicks had poop stuck all over their butts and I've since learned that can be fatal. That aside I did it. I had three black sex link chicks already that were very healthy and then I brought home two welsummer chicks and two barred rocks from this store I didn't like. They were all clean at least, but one of the barred rocks I discovered after getting home had an injured foot. Nothing horrible just a skinned toe basically. I was worried about the rock because it kept climbing up onto the perch and just sitting their while that others pecked around, or it would come down and stand on one leg keeping the injured foot up. However I've now just lost one of the welsummer chicks and I'm concerned I brought something into my little flock from the "bad" store. She was hanging out a lot in the heat but I didn't think much about it because the welsummers were the youngest and I figured they might be a little cold. I found her trampled and flattened under the heat lamp. Now I'm jumping at every little thing. Like I checked on the chicks and it's night time and a lot of them are laying down near the light. I started worrying. They haven't been on medicated feed because the store that I got the black sexlinks from that is MUCH better suggested I not use medicated feed because they find it blocks their systems up more. Now I'm planning on getting some medicated feed tomorrow in hopes it might help prevent anymore loses. So here is my question. On roughly 1 week old chicks how do I know if they are acting healthy or not and if so what should I do? I've only had chicks once before and they were very healthy and I never lost one.