Our flock tested negative for any viral infection. They had a bacterial infection which we treated with durymicin on the onset. We lost 2 birds. It started with crusty eyes, and then a cough. The sicker two then got the rattling in their chests. This went on for about 3 1/2 weeks. The two we lost were a Polish hen and a blue Auracana hen. So sad It seemed to take the two that were the weakest/filghtiest. We had the Dept. of the Environment come out to test everyone and got the result back in two days. They were very informative and there was no cost to us for the testing. Iam so happy that we don't have to cull the flock. We will continue to treat with antibiotis for another 7-10 days.