I just got five of these same breed chicks from our local farm auction today. One was really picked at so they went very cheap. I am going to look them over for mites also. But I am unsure of the breed or the age, or if they're all hens! My guesstimate on age would be 6 weeks but I'm not sure. They look a lot like my bantam cochins in the face, but they are bigger than them and do not have feet feathers.