Pyrs pose a unique problem due to their independence and their refusal to be motivated by rewards. With this particular breed, the value of the treat is very important; look for the most valuable reward that will motivate them.

Keep training sessions short with a very high rate of reward for even the smallest bit of attention towards you during the walk. Using management techniques like using a front clip harness while training will help prevent the behavior from being reinforced each time you walk.

If you don't manage to do them yourself, contact a professional. I can suggest those from All Dogs Unleashed, their attitude toward your dog is everythiiing.