Far too solid an animal to be a yearling or even a young buck .The back has a slight dip not seen in youngsters and the neck is far too thick .The fact that he is not fully summer clean, combined with other facts would say hes older than any of the other guesses.Antlers are squat ,a grissled face ,although not a clear sign of age by any means but i would say hes on the downward side of life .