More than half of the states in the Union have some sort of Castle Doctrine or Stand Your Ground law [1]. It's not just Texas.
[1] http://en.wikipedia.org/wiki/Stand-your-ground_law#United_St...
[1] http://en.wikipedia.org/wiki/Stand-your-ground_law#United_St...
While Wyoming is definitely not a tech hub, they do protect your right to use lethal force to protect your property.
Plus if they steal your horse, you can hang them and shoot them. win/win