Other likely symptoms include: 1  radiating pain in the face, jaw, or neck, 2  jaw muscle stiffness, 3  limited movement or locking of the jaw, 4  painful clicking, popping or grating in the jaw joint when opening or closing the mouth, 5  a change in the way the upper and lower teeth fit together.
Then you can train your dog to walk to heel, and prevent them getting the opportunity to pulling on the lead. Every time your dog gets to pull on the lead in the middle of your training program, they are getting a chance to perfect the pulling habit and reducing the effect of all your hard training work.
#2. Maybe I can help, years ago I used to train for competition obedience, and attention heeling was taught for the obedience ring. In the ring I used the word heel. I wanted 100% attention. I also wanted my dog to be able walk on a relaxed leash without looking at me, for walks, for walking around the grounds etc.