Bucking horses are more commonly raised by professional breeders, while many bulls are also bred by hobbyists who sell them to stock contractors, experts say.

NEW YORK — Each year, when the bucking bulls arrive at Madison Square Garden, livestock trailers pull into 33rd Street and back up to ramps that lead five floors up to the arena.

Kyle Searle has been raising bucking bulls for young bull riders for many years on his farm near Idaho Falls, Idaho. These ...