I have a horse that has been perfect, practically a "anybody can ride him" type of horse til now. He's nine years old and he'd never bucked in his life til one day last winter and I still don't know why he did it. It wasn't bad but I won't put up with it. Now he's starting to get really hot around cattle. I was trying to hold him back the other night because some of our cows are a little on the spooky side and I wanted to walk, not run and chase. He got really nervous and it was pretty hard to control him. I know I did the wrong thing by getting off but I watched him and he just stood there and shook, watching the cows and another horse and rider. Any ideas? The bucking that came out of the blue has me concerned too. Thanks for any advice.