I have a 50 lb. lab/Pitt mix and a 10 lb. toy poodle. I just got the leash in the mail today and tried it out; what a difference this will make for me. I have been walking the dogs with two separate retractable leashes that would continuously get tangled up especially if while walking we encountered another dog. This leash is adjustable so that I can lengthen the leash for one dog or shorten it. I was a little concerned about purchasing the leash due to the reviews mentioning that the coupler was too heavy for toy breeds but I don't find the leash to be heavy for my 10 lb. toy poodle.