I had five chickens, in 2 coops with covered runs. 2 were Bearded Belgian d'Anvers, one of which died and the other showed outward signs of dry pox. She is getting better fast, and laying eggs again. The other coop, has 3 5.5 month old Salmon Favorelles. They did not get the Pox, which I have read is spread by mosquitoes. I live in the Houston, TX area so there is no shortage of mosquitoes! Both coops have covered runs to protect from predators, and I have both runs covered with a heavy cloth to protect from wild bird droppings possibly carrying avian influenza. I bought Pox vaccine as soon as I figured out the little one had it, but she is getting better so fast I am not certain whether to vaccinate my Salmon girls. Advice???? PLEASE! Thank you so much for your help, I love my girls. I felt terrible when the other little one succumbed. She had no outward signs of anything by the way.