Since you folks are the experts on e collars I thought I would ask this here. I've got a small 17 lb dog that I want to train better than he currently is trained. He knows sit, come and stay pretty well, but if he is distracted by other things he will not listen. where we live there are 5 big dogs in the nearby houses and I want to make sure that if we wanders off towards potential trouble that he will listen to me and come back. Any suggestions for a simple e collar for this type of basic training? Thank you!