Jared's animal instincts won out.
He followed the females to the barn.
He let his sex organs get the better of him, used his little head instead of his big head.
The farmer who took possession of him had no need for a bull to breed the cows with, but decided to keep Jared as a pet. In order to discourage unruly behavior and aggression, the farmer had Jared's balls snipped.
That's right. Jared lost his head, and his balls followed.
Imagine his horror when one morning he woke up in a stable, fully human again - fully himself... minus his balls and clothing. He would never be a man because he had acted foolishly.