Have a batch of broilers that seems to have got CRD. They have all the signs. Not sure how this happens I've only delt with two hatcheries and one was tested for MG the other was not tested for it. I could see this on the NPIP paperwork, so not sure how it happend. I'm on a brand new piece of property and have learned my lesson with this disease over the years as I only bought stock from hatcheries... no breeders... no run of the mill chicks. Well needless to say it didn't matter 200 birds are now sick with this terrible disease. I have 500 turkeys and 200 broilers in the brooder ready to go outside any day. They aren't sick as of right now but I want to keep them that way. What would be a safe distance for them to be away from? I thought CRD was transmitted through direct contact? These birds are raised in a tractor out in a field by themselves? I have 200 broilers that are 4 weeks old and will be ready to process in three weeks if there growth isn't stunted too badly. What would you use for them? I have found a Tylan at tractor supply that is used for cattle and swine... is it ok for chickens? It doesn't say poultry so not sure? I have Durimyicin (sp) would this work? I think it's a broad spectrum antibiotic and not sure if it's powerfull enough. As of last night about 20% were sick the rest were fine. I'm going to treat them all as to try and nip it in the butt. My biggest concerns are the layers as if they get sick I'm in a whole world of hurt. 300 layers for eggs coming down with CRD would make things difficult around here. If I can isolate this case for 3 more weeks I would be ok. What is the best way to disenfect for this disease after these birds are gone? Ground? Feeders? Waters? Pens? Thanks guys... I pretty sure this is a common question in this part of the forum so I'm hopping for some good input.