I've been doing a lot of research and think a couple of my hens have this. Does anyone have any experience treating this? If so, what have you used? I have read about lots of stuff on the internet and in books to treat with, and also read cull your birds. ugh I need to hear from someone with real experience and what you used. One is an older hen, but the other is a hen I just hatched last fall. Cull is not a word I want to hear, but I don't want to risk my whole flock either.