Because hogs don't climb trees.
Nothing wrong with a cur dog who opens a bit, but if your having better luck with hounds and open hound crosses, then maybe you haven't seen any real good cur dogs.
Not that hounds and their crosses aren't talented, but uf the curs were really top notch, then you wouldn't need to add hound (in most instances)
You don't have to add no hound to them top notch Cur dogs cuz they've already got a splash or two in em from way back