If you're going to own a pet bison, I suppose it's key that it's housebroken.
If you don't mind a drive across the state, you can buy a pet bison from one Texas couple that's selling a housebroken one. Just make sure your homeowner's association approves before you add it to your Tyler neighborhood.
The bald eagle has been the only national symbol for the past 234 years, but there's a push right now for bison to be recognized too. Bison may not be top-of-mind here, but Texas has hundreds of them.
Besides zoos, where do we find them?