Tried the coupler.. haaate it... it's going back tomorrow. Mya is so curious and pulls so hard that poor Ollie was getting dragged and choked all over the place. We got 4 houses down and turned around to get the 2nd leash... muuuuuch better.. lol. Tangles a lot, but at least both dogs can explore and not get pulled all over the place - unless it's me doing the pulling, of course