When I was a kid chickens were so easy.... I think one of my hens has dry pox...pretty certain, found 2 yellowish bumps on comb, stopped laying, comb shriveled and oale...but still eating and tunning around just fine. Everything I tead says to santize...how do you do that when they free range??? I have 3 other hens who have obviously been exposed. Do we just ride it out or is there a safe sanitation method?