I see you like the game Chess, lol! Yes, you definitely need to get these boys acclimated to their leashes. I don’t have much to add because I feel one of the best ways to leash train is to stop in your tracks when they pull and when they come back to you then, and only then, start walking again. I also like the reverse move then they are pulling. This helps them to keep focus on you because they never know what you might do next. Also, working on “focus” or “look at me” helps, too, before you begin walking. Are you using a regular collar and leash? Some people recommend head halters or no-pull harnesses for training. I’m not really a fan of either, but with larger dogs they might help.
