We gelded three stallys this year (yippee!). One was nearly three, one was eight, and one was about two. Life is so much better, now! The older stally had been used for breeding a few times. He was a real sweetheart with people and the ladies, but was horribly gelding agressive. Now he's an equal opportunity picker oner. He picks on the mares and the geldings - but it's all in fun, now. He is really enjoying life in the herd. The other two youngsters were never separated from the herd, so they didn't even notice anything was different.
(And before anybody says anything - one of the stallions (the three year old)had serious health issues, so we had to wait to geld him - he didn't drop until shortly before he was gelded, and we lost him just recently anyway, in spite of our best efforts. The other one was supposed to be a gelding. We got up one morning to the most gawd awful racket - squealing and screaming you've ever heard. Stupid thing had dropped over night and one of the mares was in heat. Fortunately, she was in a different pen. We got him gelded PDQ!)
Plain Old Dee, horses Dancer and Rain I believe in dragons, unicorns, good men and other mythical creatures!