I had a hen come down with a horrible gurgling sound two days ago. Strange cough like sounds too. She is a Blue Copper Maran that is 2.5yrs old. No other symptoms. I confined her to a crate in the basement. Treating her with Tylan 50 twice a day at a dose of .5ml. This morning I went out to the coop and found a hen with foam coming out both eyes (the blue copper's sister) another slightly(2 months) older blue copper hen with one side of her face around her eye swollen. One bird other older hen sneezing but no other symptoms. The few months have been a doooozy. I had my favorite hen pass unexpectedly with minimal signs of something wrong before she died (late fall) I had a broody hen out while she was hatching chicks then put back in. Then two months ago my old rooster passed unexpectedly - no real signs except possible seizures. He was in with one other hen who received injuries during that horrible day he died. She was crated until her injuries healed. When she was out I had another hen with a broken toe! So they were on rest....and put back in when I had a 5 hens given to me, I re-homed two immediately, and two hens just two weeks ago found a new home. In addition to the 5 gifted hens, she gave me 7 chicks which were added to my two chicks that we hatched. (They are in a different coop on the other side of the yard) Then this past week I brought home two hens from the poultry congress. Added them into the big coop - NOW I have sick birds. No idea who brought it in. No people come in contact with my birds - just the birds I brought in. I never where my street clothes (aka farm store clothes) back to the flock. I am completely and utterly sick to my stomach thinking the worst of what will come of this whole fiasco. So- as of right now- I have a hen on tylan 50 in the basement. The big coop flock is being treated with Duramycin-10 in their water. What else can I do? Do I treat the chicks? They are almost 9 and 13 weeks old. What do we have????