Both these breed need a large amount of exercise. Currently as little puppies they need not be given heavy exercise as the bones of the legs will go out of alignment. They are both too big for an apartment, so I do not suggest a second big Dog. Your Labrador can be taken for regular exercise after he is 8 months old, but meanwhile needs to run free to exercise himself. This can be done with the use of an extended leash on a lawn or open ground.