These are 2 wonderful , amazing males that found their way to my house 
One who SADLY just left this world last year you all know was KINKY, a yellowhead male that came to me through an old forum Pal, Don C. He had bought a group of collareds that needed some major TLC (calcium problems) for a person who had been doing research on the Utah group for 5 years.
Anyway when sent to me , KINKY was said to be an older gent at at least 5 years of age with MBD that left him with a terribly kinked tail and some leg issues.
I was fortunite enough to have had that special guy in my life for another 6 years. Which wouLD have made him approx 11 years old . He walked like an older animal , but was still a beauty!
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2. The Amazing KONG, this BIG guy had to have been an older boy when John Eddington wrangled him, and sent him to me :0) He was huge then (older) I wish I knew just how old, but he had seen some action in his days with some scars from fighting, and I assume protecting his turf.
** This AWESOME KING (KONG)and friend of mine, at his older age in the wild came to live with me for another 5 years now, and I HOPE and Pray I can say I have him in another FIVE 
SO Valerie, I know 10 years and 11 years old is definitely not to uncommon.
Kinky left me last season 2007

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PHEve / Eve