I'm going to try to explain this, but I have a feeling I'm going to fail miserably. Might be able to get some pics tomorrow. Rusty has absolutely no topline. His spine actually sticks out a little, but it has a nice fat cover over it. He is by no means underweight. He's actually on the verge of needing to lose a couple of pounds. You can get a good idea of his weight in the pic I've attached. You can't really see his back though, and I actually think it's gotten more noticable since that pic. Does anyone know what would cause this? I'm not certain that it's actually a 'health' issue persay, but I wouldn't rule it out.