Thanks everyone for the replies that just confirmed what I suspected, productions strains do end their prolific laying early on.
One thing I'm a little confused on is sex linked chickens. People are saying that red stars and golden comet sex links will have this early burn out. Why is it that the cross breeds burn out early? I thought these were just crosses of RIR, barred rock, hampshire reds, rhode whites. Why would a cross of these that make a sex link trait be any different from a cross of your average barnyard mix? I thought barnyard crosses, i.e. mutts, were actually supposed to be stronger healthier better laying hens than your purebred. Aren't sex links really just mutts that you can tell a hen from a roo?
If that is true I might have to rethink my plan of making black sex links with my RIR and BR. My barnyard mutts and laying great but it only been a little over a year with them and my first time breeding them and I just let nature do its thing.
Should I just let nature go and get a general mix of everything and have a bunch of mutts, put my RIR and BR together for black sex links or keep my couple purebreeds together to keep the purebred?
Hmmm..... I think I need to go and cross post this on the breeders forum too.
Thanks for all the info.
Cory