There was one on another thread that lived to 11 months I think? Old enough to breed some hens and have chicks. He was apparently over 15 pounds and the size of the guys turkeys.... He jumped off of something about a foot off the ground one day, gave himself bumblefoot and died because of the infection and the weight he gained when he wasn't as active.
I had a two year old CX hen and my aunt had a 3 year old that got killed by a fox.