The BioThane Pet Walker leash is a no-tangle leash that offers pet owners ease and control when walking two dogs. Its anti-twist, anti-tangle design makes walking two dogs easy. The leash never tangles no matter how many times your dogs walk over and under each other. One dog can't drag the other dog as a coupler or brace can.  The design also gives dogs room to do their "business" with 6-8 feet of separation when needed unlike a coupler or brace.  So you have three dogs?  We offer the leashes individually so you can add a third or even fourth, although this limits the "untangling" feature.