Has anyone dealt with avian pox/fowl pox before? I think I read somewhere that if a chicken has it once then they won't get it again. I really don't have the means to vaccinate 24 chickens. My roo has these very very small black scabby looking dots on his comb and I just noticed a line of them on a wattle this morning. The ones on his wattle looks a bit more like a scratch but who knows. They are not pussy or large, they just look like scattered little scabs. What should I do?