I didn't know about avian pox until all my birds got it. That's how I first found this website. Searching for the answers. It does sound like avian pox. I lost several birds because they became weak and the others picked on them. They did not get enough to eat and died. Watch out for this. Also, you will need teramycin ointment for their eyes. The pox will infect around their eyes and it gets really nasty. It can easily spread through your whole flock, as it did mine. As far as vaccinating is concerned, now that I know about it, I plan on vaccinating any new birds in the future. I don't like learning the hard way!