LAST EDITED ON Apr-25-11 AT 10:31AM (MST)[p]Not a bull, but I once shot a cow in Montana on one of the winter Gallatin hunts that was 14 1/2 years old. She was huge, for a cow, and had ear tags from when she was a calf, as well as a radio collar that was over 10 years old. She weighed 466 pounds field dressed, with her lower legs removed, on the Gallatin game check station's scale. The biologist working there told us she weighed right at the average they had for mature 6 pt. bulls, and over 100 pounds more than the average mature cow weighs.
The warden and biologist working there were stunned when we told them she had a bull fetus in her. They couldn't hitch up the trailer with the snow machine fast enough to get to the kill site to recover it for study.
I also shot a cow once in New Mexico in unit 15A on a bowhunt that was sway backed, with her ribs showing and she had a lot of white hair, especially around her face. Never had her aged, but she seemed ancient. She also ate terrible, even worse than that Montana cow did. If hamburger could be tough, hers was.