I recently adopted a German shepherd Named Kodi, he is 4 years old. He loves his walks and whenever I have a chance, we will go for a walk. I have been noticing more and more that while on our walk, Kodi tried to snap at passing people. It looks almost like he is pulling to go over and say hi, but he will take a quick snap at someone as they pass by. I find this very concerning as I don't want a biting dog and I don't know how to stop it. He snapped at an old man today, luckily he didn't notice cause he walked by faster than Kodi could snap, but i heard his jaws click when he tried. How can I stop this?!? I bought him a Halti today hoping it would help as I can control his head and close his jaws, but I really don't want problems or a lawsuit on my hands!