Hi,
we actually breed and show dairy goats so I may be able to help. The shape of the scrotum it not what you should look at. To improve your udders, you want to see the structure of the mothers of the bucks. You should also select for a wide and rounded eschucheon (which is basically where the top of the hind legs meet) But the biggest thing is to review the mothers udder. And what are you trying to improve on the udders? Capacity, for udder, rear udder, medial suspensory ligament etc?
