mate he should be old enough,just tire him out.
take him to a field and get him sprinting around,you and a mate run in different directions and take turns calling him and running off,then when he's really tired take him for either a slow jog or fartlek it if he's too tired for a steady jog,may be best to this on grass to save his feet.
if you run make sure afterwards you walk him for a good 10 mins or until he's not panting at all,then give him a rub down and a good feed and stick him in his kennel later on check on him let him out for a piss and leg stretch and give him a bone.
al