I have this silly as a wheel and wants to run at 50KPH kelpie thing and have been battling for a year to stop pulling at the lead. She is now OK with me but others in the familly (old and young) were still having trouble.
Bought a SENSATION (tm) Harness - - the lead attaches mid chest rather then at the back. Worked instantly...she now walks at heel for every one. Am thinking that people with a conventional harness might still be able to attach the lead at the front.
Yes I used a halti and she pulled and huffed and snorted all the way.