Stomper is a custom harness maker . Had the padded neck and shoulder build I was looking for . Now I start a dog with a quarter body weight and pull for say a half mile . I always take it slow . Never on concrete or pavement sir , always grass or deep sand I prefer . I drag for distance low weight now , thing in comp its 16 feet in under 60 seconds . All mine naturally love it so was quite easy . Walk em in the harness maybe pulling an old milk jug with rocks to get em started if young . Hope this helps a wee bit .