Don't even know how old mine are. I should've kept a diary or something.
Here is a pic of my hens. Can anyonetell age range by pics?
I'm far from a pro but from what little I can see of their faces, they look like mine did at about 13 weeks. I have six barred rocks and they are changing daily!
My girls at almost 15 weeks
The girls today at exactly 16 weeks