Tanner will not walk with a leash on. Right now we only have a collar on him and I am wondering if he would do better if we went ahead and got him a harness. He just lays down and will not budge when I try to get him to walk. He will be four months old on August 9th. Any ideas on ways to get him to move? We would really like him to join us on our dog walks but if he won't move, this makes it kind of hard. All of the dogs I have had in the past already walked fine with the leash so this is all new to me. Any help would be great!!! Thank you!!