That first hen looks like she's in a moult to me. Her neck feathers are short and her tail almost missing. I believe she's a mature hen, but if you post her feet, I bet we could tell for sure. From the pic, her feet look worn as aging hens do. Doesn't mean she won't lay tho and I would definitely give her time. Moving her and if she is moulting will definitely put laying off for a while.
Jody