We got a big dog at 6 months rescued from spain . Hes either a mastine or a anatolian mix , who knows . Hes 11 1/2 stone now and soft as shit , likes a bark at people out the front and postmen but nice and docile . Hes never been upstairs and even tho hes now 8 or 9 and old and cumbersome we still have the baby gate up incase he tried going upstairs . Whenever me or mrs leaves the room he follows us . If im out in the shed the kids are upstairs out of his way . You just never know and you dont know whats fully going on with them inside their head