Back when we lived in the country we were given a just weaned female pony and a male calf. They grew up to-gather, played chase games, were always by each others side. Then one day when they were both just over 3 years old and grown, the bull started screwing the pony just like it was a female cow. Neither seemed to mind, but I found it some what embarrassing, nobody else seemed to think anything about it.

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