After Sherry, I'll probably not get another sex linked. She started laying at 5 or 6 months and laid through her first winter. Molted second winter and then this last summer has been in a semi-molt and egg decline since June. Will now lay just a couple of times per week and the shells are either very soft or non-existent. Which means we're changing the straw in the nest box every few days. Supplemental calcium and protein do not help her condition. If she weren't the happiest of the bunch to greet me and her antics didn't make my heart smile she'd've been dispatched already.
Hopefully breeders are working on longer healthier lifespan for sex link chickens.