I use a collar on my dogs when I work with them. I either take them into our basement or in our own yard. Lets Go is a command I use to ask my dog to move out. I keep them on my left side controllling them with the dog leash. When the dog starts tugging I use a quick but not hurtful tug. I allow the dog to move ahead after the first tug if he/she keeps tugging I use a quick but not hurtful tug to give the dog the hint I am in command. It may take lots of what I call corrections but they do catch on. You have to be consistant & I usually work with them about 15 minutes a day to start with. The idea is to teach the dog to not tug & walk along at your command. Praise your dog when he/she does what you want.