My horse has always tossed his head after fences when he got strong and wanted to evade the bit. It had gotten better, however, now he tosses his head on the way to the fences, and when I put my leg on him to push him into the bit he starts bouncing and tosses his head more. Tried a running martingale and it just pissed him off and he started rearing. We have tried numerous bits and nothing seems to settle him. We have tried a hackamore but that seems to be too much. Today he only settled down after I really got into him, before that he was going sideways or standing up then throwing his head. Are there any exercises that help head tossers? Or has anyone found a bit that mouthy horses seem to like? It's becoming very difficult to jump him as his head is everywhere and he isn't paying attention unless we have a ten minute fight where to put his head. He is 10, so not a baby. Trying to get the chiro out to see if it is his back, even though he isn't sore.