My first choice, if it was my own decision, would be to do a free rehoming to someone who has similar hens (age really doesn't matter if the hens is of laying age) and who babies their chickens like you do. He's an old guy, but I hate to put down a healthy animal, personally. I don't fault you for considering it, certainly, and I understand why. In the end, it will have to be your decision, of course.
