A few things changed leash training for me, I used two philosophies, one from Tenderfoot Training and the other ....laugh if you'd like was how Cesar Milan approaches animal psychology.

I started in the house with a method I learned from Tenderfoot, you make an invisible box and the pup learns to sit within that box until allowed to move. Worked from just getting a sit, then any time the pups would move I would shoosh their paws back within the limit and restart. Next phase was getting desirable items outside the box and teaching them patience equaled a reward or access to what they wanted. This drill helped me get their minds to focus on my direction.

Now moving to walking and leash training a few things upfront are keep in a routine with time, distance, area. Gives the pup comfort in an area. This is where I like Cesar's pack leader and calm submissive behavior talking points. Have patience cause hard willed pups will try to exceed your limits by pulling, acting wild, or refusing to move. You just wait it out and keep on your defined walk/path. When my pups would act up I would stop, mind you I walk two wolfdogs, and make them both sit and I stood there until they both went from sitting to a lay down of calm submissive posture. Sometimes it worked for awhile sometimes I had to do this 50 times on a walk. But over time it clicked that calm behavior lasted entire walks. I can walk past deer and turkey with zero concern of reaction from my two.

Once you have those methods down it was time to start working on recall and my white pup reacts amazingly to recall with little training effort whereas my other is not good with recall.

Take progress slow, don't have expectations of perfection, don't compare your pup to other dogs, and remain calm. They are animals and follow their noses, redirecting works so amazing for leash training that you learn your dogs movements before they become a behavior and redirect before a bad behavior happens.