What a lot of people don't realize is that the Halti, just like the prong, a muzzle or e collar must be conditioned just the same.Fighting it to turn her head. She is very active and alert. She can walk one direction with her head swiveled to look behind her. The more she felt her head was constrained the more she fought it and she would not calm down. This was after a lesson using it in someone’s yard. It did not work on a walk. This is the same dog who went into drive, jerked the leash unexpectedly, knocked me off balance and I had a broken bone.