Several of my gals made it 12 and 13 yrs old. It seems, in my flock anyways, if they get past 7 years old, they have the power to make it into their teens. Here's hoping Bigs lives a good long life!! :fl
My hens crow was weird, low and growly. An only an occasional crow. Her saddle and sickle feathers weren't as long as a roos, but they were a twice as long as the standard hen. Your gal may start crowing too, my gal started in at 7 years old.