My 11 almost 12 week old puppy (lucher x springer Spaniel) refuses to walk , I have to almost drag him and then he lies down on his tummy with all four legs flat stretched out and refuses to move , Iv walked him a few times and has been fine ( same route everyday ) anyone no y he ment b doing this ? Any advice ? I take and pick my son up from school aswell so would hate to crate him if he can come with me tia