what kind of leash do you guys recommend for a 2lb 10 wk old chihuahua/maltese breed? i really need to get one so i can train him, w/o a leash he runs all over my backyard and is very hard to control... just not sure which one to get, also i work from 9-5 and dont get to take him out much for walking, etc... only when i get home, whats a good amount of time to walk this dog?