My Paint gelding has begun this bad habit of wanting to stay by the fence where the other horses are when I'm trying to ride. He'll walk a bit one way, but then he'll ignore all your cues & go back to the fence. He's neck reined, so I'll turn him right, he'll go about 15 feet, then turn right when I'm asking him to turn left. I was thinking about sending my horses to my grandpa's for the weekend, all but him, & then riding him out alone to see if his problem is the other horses, or if he's just being a butt. He still walks/trots/canters, transitions smooth, stops, backs, but he doesn't want to listen to directions. I rode him today & he did slightly better, but once he fought his way over to the fence, he wouldn't move far from it. Tomorrow I'm going to ride him in front of the barn (small area, like a round corral, but more of a square shaped) alone, to see if he improves any. Any other suggestions on how to fix this?