We had two studs gelded in March and one in June (the June one was a surprise - he was supposed to have already been gelded!) One of the studs gelded in March was my filly's baby daddy, and had been used to cover several mares (shudder). He was extremely gelding agressive - unless there was a fence between them.
In August, we sent all of our horses but the baby daddy and the one that became a gelding in June over to a neighbor's to help graze down his pasture (and lower our hay bill). We decided to try turning the two into the same pen to see what would happen with no mares around. Talk about anti-climactic - nothing happened. They studiously ignored each other. We did set out two well separated piles of hay, but eventually we noticed they were eating together.
I guess our gelding agressive guy kind of got over himself. Kind of, anyway. He can still get pretty rough with the rest of our little herd now that they are all back home.
Plain Old Dee, horses Dancer and Rain I believe in dragons, unicorns, good men and other mythical creatures!