My friends never left the coop. she has about 8 dogs right next to the coop and they were fine. Do you have sulmet? I got it for her at the local feed store. I hope very much that you are able to get it under control, but wast no time trying things. And if you do lose one, i hope you get it tested. It will make all the difference in the rest of your flock. Some things can be treated and all is gone.....and other illnesses stay in the bird and if you get new birds, they can get sick too. As if your would be carriers. So it would be worth it to know what it is. I think people sell birds if they know they are carriers just to get rid of them. I hate to think that people are capable but it seems that they do this.