Would a gelding that is proud cut or gelded late display stallion like behaviour around mares? When Buzz is around the mares here he arches his neck, snorts, roars, raises his tail, paws at them. But doesn't do it around the geldings.
According to his papers and some history I found he wasn't gelded til late. I'm not 100% sure if his last owner did it or not, but he was 7 when she got him.