The belly on my Mojave girl doesn't really change much at all from what I have seen. I can generally tell on her that he color seems really faded, almost foggy colored. Then her eyes will get dull for a day or two, and then go through different shades of blue for a few days, then her eyes clear up a little, but her skin still looks a little foggy... then all of a sudden she looks bright and I find a little ball of shed in her enclosure somewhere. Every time it's like getting a new snake.