I'm new at this and already feeling very bummed that this is happening... here's the story. We have 22 bantams that are 4-5 weeks old, 6 aracaunas that are 4-5 weeks old. We had 2 sixteen week old hens, a buff orpington (died last night) and a NH red. I had been housing them in the garage until about two weeks ago (in multiple large rubber maids with tops cut for ventilation and heating lamps). The two 16 week hens were in an extra large dog crate on their own and we have only had them for about two weeks. We built a very large walk in coop 7ft by 7.5ft with lots of ventilation and roosts and nests. We moved the chicks in first for a few days and let them all loose to get to know each other. They did really well. (They had been in containers all near each other their whole lives, so they had all seen each other all of that time). I did notice the aracaunas pecked on a couple of the bantams for a day or so, but they they all got used to each other and it seemed ok. We got the two hens from a friendly farmer around the corner from our house. All of his hens were (and still are) healthy. While he has a lot of hens and some of them are outside and free range, these two were from his coop and were not part of the free ranging group. I put these two hens in with the chicks on Friday (5 days before the orpington got sick). I kept them in their crate to keep them separate from the chicks so they could get to know each other before I let them out completely. Monday I let them out. Wednesday morning the orpington got sick and she died Wednesday night. She had bloody diarrhea. At least one other bird has bloody diarrhea now, though I am not 100% sure which one. I suspect it is the other 16wk old hen, but she is eating and drinking and does not appear ill as of the am. Three of my bantams seemed low energy this am and I isolated them. I started them all on Duramycin last night. Here are the answers to the basic questions: 1) What type of bird , age and weight. orpington, 16wk, bloody diarrhea, tired, no respiratory symptoms at all NH red, 16wks, suspect bloody diarrhea, but seems to be eating and drinking and walking around 3 4-5 week old bantams, tired and huddling together even though other birds around them are active and peeping, isolated this am, *I think* still eating and drinking everyone else seems ok 2) What is the behavior, exactly. see above 3) How long has the bird been exhibiting symptoms? I did not check the chickens on Tuesday night, my husband did. He did not observe anything out of the ordinary, but he's not really into the chickens, so I don't know if he would have noticed any changes. I noticed the buff was not well Wednesday am and she died Wednesday pm. I found two spots of bloody diarrhea from another chicken (not sure which one this am). 4) Are other birds exhibiting the same symptoms? yes, though not nearly as bad as of this am 5) Is there any bleeding, injury, broken bones or other sign of trauma. one bantam has a swollen foot and she is limping. I asked at the Agway, they suspect bumblefoot. Her foot has been swollen for about 5 days. She is now isolated though she wasn't isolated until this am (she is one of the 3 bantams that seemed tired and huddling) 6) What happened, if anything that you know of, that may have caused the situation. I am wondering if some bricks that I put in the coop are to blame. They were bricks that had been in our backyard for about 5 years or so? I'm not sure. For a while anyway. The only part of the coop that we had not built yet was a drippings board underneath the roosts. So I had used the bricks to raise the food and water above all of the bedding and put a few bricks around the food and water so the smaller chicks could get to it. This combined with the stress of moving and being introduced to new chickens (though I thought I did this the best way possible). 7) What has the bird been eating and drinking, if at all. See above. 8) How does the poop look? Normal? Bloody? Runny? etc. like a small spot of water with a little brown and red in the middle 9) What has been the treatment you have administered so far? Started duramycin last night in water, but I think I need one of the sulfas for cocci from what I've been reading. What do you think? 10 ) What is your intent as far as treatment? For example, do you want to treat completely yourself, or do you need help in stabilizing the bird til you can get to a vet? If my whole flock is going to be affected, I probably should take something to the vet. I would like to treat as much on my own as possible, though. 11) If you have a picture of the wound or condition, please post it. It may help. Will try to get a picture of the bumble foot shortly. There are not obvious scratches or wounds. Does not appear broken. Just one leg is swollen. 12) Describe the housing/bedding in use pine shavings, starting the composting method. Every day I try to turn the top over and spread a new layer on top.