I agree Jack,but in a wee bit defence of the owner,it has wrote on the back of photo "brood & puppy pens". May well be that the 3x youngsters were being moved shortly,although they look to be more than large enough to be past "that size" puppy pen stage. The kennels also appear to be slightly smaller than the pen fence & close to it,which would make the actual height less.
Maybe someone knows any history on the Sebrina female ?