Hey, I haven't been giving you answers as I don't have any, but I've been following this thread because you have been taking such good care of roy, it was heartwarming. It is terribly sad when a chicken is just too old, when anything turns old really, and it seems like there is nothing you can do for it. But it sounds like you are taking the best possible care of your rooster, it's the best your can do, and I'm know he appreciates it. Wishing the you the best!
