I recently adopted a lab puppy. She is now 13 weeks old and weighs about 30 lbs. She has a tendency to pull on her leash. i wnet to the feed store and a trainer there sold me a prong collar. He told me that when she pulls on the leash, i should silently, and suddenly change direction while giving a quick jerk to the leash.
So i tried this. She yelped, and changed direction. He said the goal was to get her to focus on me as she walks. However, she's a fairly bright puppy. She figured out pretty quick that pulling yeilds discomfort, so now she lags behind - 2 or 3 feet behind in fact.
Any suggestions as how to correct this? or should I just tug her forward?

