The horse's mouth is a good place to look when he exhibits problems such as moving stiffly in one direction, tossing his head up, curving his neck in or feeling unsteady in his ride. Another common sign of a horse that needs dental attention is dropping feed.
Teeth that have become sharp and are cutting the horse's cheek may trigger all of these problems. The horse's defense is to move his head in such a way that he protects the sore area in his mouth.
For more information, please read the story Dental Care for Your Horse.