Big, Attractive Mack Is A Strong Boy. He Needs To Learn Leash Manners, As A Dog Of His Size Can Be Difficult To Handle On A Leash. Mack Is Such A Cute Boy. He Has Been Very Friendly With Our Volunteers. He Really Seems To Enjoy Going For Drives, As When He Sees A Vehicle Door Open He Wants To Jump In. Mack Did Spend Part Of His Life Tied Up On A Chain, So He Probably Needs To Learn House Manners. While At The Shelter He Did Participate In Play Groups With Other Dogs.