From what I've read, Roosters fed a Layers feed after 18 weeks old don't succumb to excess Calcium till around 3 years old if they are predisposed.Will pullets intake more oysters shells as needed by nature than roos if I give them regular chicken feed? Or just go with layer feed and and roos are fine with it?
Most Roosters that free range will die to a predator defending his flock by the age of two.
If I fed a Layers feed my rooster would get the same.
I lost two hens this year, one in March and the other in June while free ranging to a Fox or Bobcat an hour before sunset. They were 19 and 22 months old.
That said, if you keep your chickens in a predator proof pen, your rooster could live well past 3 years if fed a Non-Medicated Starter-Grower or All-Flock feed, but would probably be less fertile than a younger roo. GC