One of the horse's at the barn continuously pulls on the bit in his mouth and he will tilt his head to the side or even sometimes turn his head completely even on a loose rein. The bit he has is a Korsteel Sweet Iron Full Cheek Snaffle so its not a very powerful bit so I figured the bit isn't bothering him. I also notice that he opens and closes his mouth a lot too. I checked the placement of the bit in his mouth and its not too far back nor is it hitting any of his teeth. I was wondering why is he doing this and what can I do to get him to stop pulling and to relax his neck. Thanks for all your help!!