So far I haven't found any on the other 5 hens and 2 roosters I have, I am going to check all of them again in a couple days. I should have noticed the signs sooner...earlier this month I noticed her bum was devoid of feathers and she was sporadically giving me eggs, it was nasty when I finally started searching her over I found eggs clustered all over her feathers on her underside, around her neck, top of her head and even the feathers on her cheeks, the poor thing must have been just miserable.