I bought the neck thing from Caprine Supply and used their directions. I tried to scale it down to my guys, but without knowing 1. How big is a full-size kid vs a ND? and 2. How exactly is the box is supposed to hold them? i have some questions (and i feel nubs on all three of the Friday boys already so i think i need to do this really really soon) Caprine's box is 16" high by 24" long. I made mine 13" high by 16" long. I put the neck holder at the top just like in the directions (b/c it said you can add padding underneath to increase the height where the kid is) My major problem is the 'chest block' (i'm guessing it stops the kid from lying down?) Theirs has 7" from the front of the kid box to the front of the block. I decreased that to 3.5" (i had 5 originally but the biggest kid's neck was nowhere near the holder then, unless it is supposed to be stretched waaaay out) Then the instructions have it 8" from the bottom of the box to the bottom of the chest block. I thought 'my guys are shorter' so i lowered it to 6" The problem is that there is ALOT of space between the top of the box and the top of the kid's back. The picture shows the baby goat standing in the box with it's back level with the top of the box - is that correct? So in that case i should RAISE my chest block higher? What dimensions do ND people use? Is there anything else I should do/add to make this better than the directions state? Any help will be greatly appreciated.