I have been battling disease in my flock since June. I've raised chickens for five years and had no disease problems until this year. I bought birds at a swap meet and from a private breeder instead of a hatchery. I kept everyone separated for two weeks and all seemed well. Then I introduce the newbies to the flock and they immediately showed respiratory problems. I bought broiler chicks from a hatchery as usual. I had poor performing chicks and bloody stools-even though I was feeding medicated starter. I lost several chicks. Finally I decided to try to find out what was going on. I took some sickly birds to the Animal Diagnostic Lab at Purdue and had them necropsied. Results: Mycoplasma gallisepticum, mycopasma sinovia, horrible coccidia infestation, salmonella, infection coryza. I'd never heard of half of this stuff! After some intense treatment the sick birds were either dead or seemingly healthy. The broilers finally got fed out and into the freezer and we agonized over whether it was ethical for my daughter to take her 4-H birds to the fair. August seemed OK, but I had a nagging doubt. The "healty" birds had been exposed to all this and my understanding was that even if they hadn't developed disease, they could still be a carrier. If stressed, they could get sick, or they could pass it to other birds. They could pass it down through thier eggs to new chicks. There went my fledgling breeding program. Time passed and I began to think that maybe I was out of the woods. Now I have two birds with pox lesions and several are sneezing and coughing. I feel like throwing in the towel, depopulating, disinfecting and starting over. Some of the diseases my birds had are carried/spread by wild birds. I'm afraid that even if I get new birds, if I let them free-range they'll be at risk. I don't know if I want to have birds if they can't free range, but I don't want sick birds. I bought from a breeder so that I could get better quality standard birds, but I brought home disease. I don't know where to go for new birds. And I'm not sure I can take putting my current birds down. Guess I needed to vent. Has anyone gone through depoplulation? How'd you do it and how'd you get through it?