Okay, so their head is not already 'down' on the metal collar bit? (i bought the one from Caprine), you pin it down? If so, that makes a bit more sense. I have someone coming to show me how to do this tonight, and i put the kid in the box to check, and his back is against the top like the pic in the Caprine Supply directions shows, but he was twisting his head all around - for some reason i thought his chin would be kind of stretched out over it, and he wouldn't be able to move his head (which would only work if there was some kind of upper bar to pin it down i guess) I am SOOOOO nervous about this whole thing. I will let people know how it goes.