I have two auracanas who were given to me by a friend when I first started raising chickens early in 2016. She also had been given them from a friend before me, so basically we have a swap going on. Needless to say, Both of the ladies have an unknown age.
In summertime they both were laying beautiful blue eggs daily, and then once July-august hit, one stopped laying completely and the other was phasing out-- even found an egg or two in the yard and in the tree line. Once august ended, neither chicken has laid an egg since.
They both went through a time where they loooked like they were partially molting, but never lost too many feathers. Their butts look good, fluffy and clean, and they still roam and eat with the other chickens.
Since it's gotten cold this past month, both spend a good bit of time together in the coop on the roost, not really going outside a ton.
Needless to say, it has been about 4 months since the eggs have stopped-- I'm kind of thinking that they are done.