I am currently in the process of purchasing a 12 year old (appendix?) quarter horse gelding, and he is the perfect horse accept for a few flaws, such as his anxiousness and he can get quite spooky.
But the worst habit that I have found that this horse has I have discovered recently, is bucking.
I've been training him to eventually be an eventer, practicing stadium, and cantering in the woods and fields, and just recently jumping him over extremely tiny logs. He seemed to be doing great, the first time I ever took him over a cross country log he freaked out very badly and refused the jump, but every other time he has taken every little log I've asked of him perfectly.
So I took him in a hunter pace recently, where many jumps were set up including a bunch of minuscule ones that I've done, I was out there with my mom on a different horse. I took him over my last tiny log before reaching the home stretch towards the finish line. My mom wanted to trot through the finish line before me, so I allowed her to go, and as she started to go my horse wanted to follow behind so I allowed him to pick up a trot. As he did so he let out a rip-roarin buck, dropped his head and started shaking it side to side. I stayed on thankfully, walked him through the finish line and back to the barn.
Today I took him out after a perfect round of ring work including some practice over small stadium jumps. I jumped him over a few of the really small jumps again, and then over that log where he had bucked a few days before. He jumped it beautifully, but as he landed he unleashed into a fury, bucking violently until I hit the ground, with my head (oww) and then ran off.
Now I am trying to figure out why this problem is occuring and I wasnt really worried about it during the first occurance, and I tossed it aside as his excitement during the hunter pace. But this time was very scary, my worst fall yet, I don't even remember anything until he was already unsaddled and being bathed by me, my mom, and my boyfriend.
I had a hunch that it may be his saddle, we are having him fit for a new one soon but this one seems to slide down his already oddly shaped back, but he was perfect for the flat work and jumping in the ring, and the first jump. It was just this jump. My mom thinks it's just excitement, but it feels more like he wants me off of his back.
So does anybody have any clues as to what is causing this problem? What I can do to stop this problem, if it should be cause of true concern and I should give up on buying him? I love this horse but these past two bucks have been terrifying especially this one today. So what am I to do? I'm already a very timid rider who is just regaining her confidence and trust in horses after several terrible eventing related falls on different horses.
Any advice or feedback would be great.