Warriors, by Erin Hunter.  Read series one and fell in love.

The bull’s name is Dynamite.  I payed $7 I think it was to ride him.  I stayed on for 30 seconds, when the bull started spinning.  Before that it was a “warm up”.  Click the link to see me!

www.youtube.com/embed/mtoTxXvkzxw<

Suzie riding Dynamite should show up.  Bottom right hand corner when youtube pulls up videos related to your search at the end.