kirby has recently been playing the "chase me game" and no matter what i do he wont come back ( even when i have treats), this happens at home if he slips out the front door, when we are at the dog park (when he does come he just bolts past me) and i am concerned for his safety.... my 5 y.o. lab mix comes whenever i call her and her first owner used a shock collar on her. my mother now thinks we need one for him to curb this behavior. i am opposed to shock collars but i am at the end of my rope any suggestions????