I agree with Kristin, couplers are not for all dogs. Both dogs need to have fairly similar walking habits. I could not use a couple with Uni and Katie, Uni is too hyper and running back and forth, Katie is a more mellow trot walker. I did fine with two retractables with them. Katie is more predictable, Uni is not, but if you have two unpredictable ones, then I guess walking them with another human is the solution LOL!
__________________  The T.U.B. Pack! Toto, Uni, & Bindi
RIP Lord Scrappington Montgomery McLimpybottom aka El Lenguo the Handicapped Ninja 10-12-12 
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