I have two hens separated for respiratory symptoms. It’s been a week. They seem to be recovering and they are pets - I don’t want to cull them. How long do I keep them isolated before reintroducing to the flock? We have a closed flock, don’t breed or show. Including these we have four more one year olds. We also have 13 chicks we bought in may in a brooder. They are in a separate area but I think they introduced the disease.