OK so I have a 2 1/2 yr old gelding who was supposedly broke to ride when we got him. But the thing that bugs me is this! OK he just recently had a tooth pulled so we decided to use a hackamore on him and he was great! He listens to it and only tried to buck once, but it wasn't a big buck. We rode him out with the cows and then by the highway and back home and he was great. He knows his neck reining and he knows when to stop and go and such and such. But the other night I decided to try a bit in his mouth to see what he would do and he went nuts!! He bucked about 5 times and they were big scary rodeo bucks. He's not that big but man can that little horse jump! My boyfriend stayed on for 4 bucks and then just decided to jump off. I don't know if it was the bit that made him buck or if something was in/on the blanket. Something was definitely bugging him that day. My dad suggested that before I ride him to tire him out a little bit before we ride so I'm going to try to lunge him before I get on him today and see how that works. Any suggestions? Any advice would be great. Thanks.