I also started to teach tyson to come outside using a long line (10metres) but he tends to do his boxer dash run which he would go to the end of the full line resulting in him getting pulled by the collar. has anyone have anyone experience of this happening? i have tried to call him when he gets like that but he ignores me. im more concerned in him hurting himself, giving him whiplash. would it best for me to drop the leash when that is happening?