How are bulls selected for bull riding?

Bulls that are born to buck. The only way you can tell if they're good bucking bulls is if you put them in a round-robin rodeo to test not only the riders, but the bucking ability of the bulls as...

No bull riding is not harmful to the bull on very rare occasions a bull will hurt its foot while jumping but not often and most times it heals quickly.

Bull riding started as a fun thing to do. Bull riding was a thing a cowboy didn't have to do in daily chores.There is not a most common breed in bull riding. Some of the early bull types were just...

money, belt buckles, occasionally jackets

Bull riding wasn't "invented". It started as a game for cowboys.