It's not a real surprise, but when his owner's first got him, he was half dead. I started working with him Spring of '08, and he didn't have any real issues, exept for being extremely lazy and not at all sensitive to my legs.
He's gotten better about responding to my leg, but even with a dressage whip, he pins his ears and swishes his tail when I tap him with it. In the round pen, he drifts to the center, so I apply my inside leg and shorten the inside rein, to keep the bend, but sometimes all he does is bend his neck inside and keep drifting. I suppose he thinks the center means he's done working. My mom suggested spurs, but the one time I used them on him, he stood there. I've also never used them before, and I feel like I have to use my leg alot on Sam if I don't carry a dressage whip.
Also, he does this thing where, when I put on the saddle, he drops his head and starts to buckle his front legs. At first, he wouldn't start until I cinched up the girth. My friend thinks he's got a sore spot on his back from my saddle(I can't afford a new one!), but he doesn't do it when I put on my mom's dressage saddle (my friend says it's because that saddle doesn't hit the sore spot). Does that sound behavioral? Or like his back is actually sore? I curry pretty vigorously along his spine, and he lifts his head and moves into the pressure. He's confusing me!!