Have you ever spent the day at the hospital having tests run? Or stayed with someone while they did? Believe me, it can make even a good natured person a bit testy. This bull was hauled to the sale facility, had an electroejaculator run up his behind, poked, prodded, measured, clipped, strangers coming in and out of his pen, which was full of strange bulls. Then he was run into a loud sale ring, lots of screaming yelling, loaded into a strange trailer, hauled, turned out in a strange corral by humans he's never seen before, probably all by himself. I woudn't blame him if he's a bit testy. If he doesn't work out, contact Express. They'd probably be willing to exchange him for another bull. We've never bought anything from them, but have heard their customer service is good. Have you got a bred cow you can put with him in the corral? A good tempered female can usually straighten out those youngsters. ;-)