The IQ Dogsport Positioning Stick is an excellent passive barrier for use in developing muscle memory during heeling.  The main body of the positioning tool forms a passive barrier the dog naturally avoids making contact with helping with forging and other incorrect heeling positions. 

The removable angle piece is easily attached with a single wing screw and can be used to "frame" the dog's head keeping it off the handler's leg. This tool is designed as a passive barrier only and is not to be used to hit the dog.