Hi all...I will try to keep this short, but there is a lot of history. A year & a half ago we started our flock with 12 chickens. Had absolutely no problems, they all laid almost every day. This past spring we wanted to enlarge the flock. Got 12 more chickens from 3 different sources (local people with ads on Craigslist). Within 2 weeks of getting them one of the new chickens (just 5 months old) died. I realized after that she was sick when we got her. She would sit in my arms and not try to fly away. About a month later, another one of the new chickens I had gotten from a different source also got sick. Found a local vet who handled birds and he said she had "wasting disease". He said she would not survive so we put her to sleep. He sent out a blood test and we discovered she had internal parasites. Spent the weekend deworming the whole flock giving them medication 3 days in a row. 2 weeks later another one of the chickens from our original flock got sick. Took her to the vet, he ran a test and she had e-coli. He give her an injection of antibiotics. 2 weeks later she was bad again and I took her back to the vet. He gave her another shot plus gave me a bottle of the batril to give her every days for 10 days. Unfortunately she did not make it. Since then we have lost a total of 6 chickens with 2 more sick as I write. One has been living in our basement for the past 2 weeks. We were giving her the batril but after 10 days she didn't seem any better so we stopped it and figured we'd let nature take it's course. She still is very thin, you can feel her breast bone, but today she seemed to rebound and I took her outside for some fresh air. She is eating well, though her stool is green and watery (most of the time). Last weekend we were deworming the other chickens again (per Drs. instructions have been doing it every 3 months) and noticed one of our Americana's was very light in weight. Today she was clearly not feeling well, and tonight was not roosting so now I have 2 ill chickens. We are totally at a loss as to what the issue is. We've thought about going back to the vet, but between the office visit and any testing it usually runs at least $150....not really in our budget right now. We're afraid that whatever is wrong is eventually going to take out the entire flock. All the chickens that have gotten sick have lost a lot of weight, they were dewormed and we have checked for lice/mites etc. We spray them with poultry spray for insects, plus put DE in the run for them to take their dirt baths in as well as mixing it in with their food. ANY ideas or help anyone can offer would be greatly appreciated. Thanks so much!!