My labrador mix puppy gets distracted/stubborn on his walks and just lays down when he doesnt get to go where he wants. Treats have not worked as he just walks to the treat then sits down waiting for another one. We have tried every collar type and 'training' tip. The trainer we paid for was also unable to help as her last suggestion to 'wheel barrel' his legs does not work either. Has anyone encountered this? Suggestions? We have had him over a month and he is not scared. He is ok when we walk with a friends dog. Please help!