Hello, this is my first post. I take care of a flock of 9 chickens. I went away for about 2 and a half weeks, leaving the care of them to my dad, who I live with. When I came back, one of my white leghorns had a terrible infection on her back. It looks pretty old. It's this round, dry, black spot on her back and the surrounding skin is yellow and swollen. It looks like the infection is halting the growth of new feathers too. I also noticed her comb is splotchy black significantly more than my other 2 White Leghorns. She seems to be fine. She's eating, drinking, and running about like any healthy chicken would. She's even laying (I believe. She may have just been brooding on another hen's egg.) I don't have the money to take her to a vet. My questions are, What should I do about the infection and are her eggs still safe to eat?