Myth/Rumor: Old hens lay double yokers.
Story: I've heard it said, that older hens will lay double yokers, and that's a sign that they're getting close to retirement.
True or False: False
Evidence: I've had plenty of hens get older, and never lay a double yoker. I've had hens up to six years old not laying double yokers. I typically see double yokers coming out of young EEs on hot days. I have occasionally seen a double yoker out of any random hen of any age on any day, but I haven't see age as the reason.