My babyblack buck, Obsidian, is almost 18 weeks now and 11 lbs. 10 oz. (LOL! I got a new scale! Very accurate!) He's just a little "gangly" at this stage. A touch long in body, could use a bit in the loin... he has the width, just has to fill out at the top. He has very promising shoulders for a baby though.
But I see a lot of potential in him as he matures. He has a couple spots he needs to "fill in" to be better balanced. But I kind of expect this, especially in the boys, and especially at this stage. The girls seem to develop a good confirmation faster than the boys.