As I let the hens out to free range this morning I noticed one of them had a couple little scabs on her comb as if she had been pecked. I watch the hens for a while and noticed a couple spots on another hen. I also noticed one hand to the side staying away from everybody and that's when I became concerned. I picked her up and her comb seems discolored. Purplish toward the top. She has a few tiny scabs and one white pustule/bump in the crevice. Can I vaccinate today and prevent further spread I have a lot of chickens including babies. What effect would the vaccination have on the meat and eggs also? It has been reported in our area and I've been considering vaccinating but hadn't gotten around to it. Now I'm worried! Here is a pic. Advice?