I had them......but don't use them, since I don't have constant control and it teaches them NO Discipline at all. I only used them when I wanted to let them run, but it was easier to just Train them off Leash. When I do their evening walk around the neighborhood one is on a 4 ft. leash and the other one is on a 6 ft. leash since they are walking in the street they must act civilized not running in 2 different directions like wild dogs.
