Short,long,retractalbe,etc.I use a six foot long leash.I had a short two foot one when I had when I had my Bull Mastiff.I might use the shorter one when she gets full grown. IMO,it makes long walks easier for people who have trouble walking like myself. I know many will disagree.The leashes I use are very thick and strong. I don't want my dog to break free form the leash.Is there a certain one you might recomend?