mine had the same problem at one point i had to change the food 5 time in one day because of Flicky using his food bowl as a bed and toilet :wacko::lol: At least he's sleeping with his butt hanging out of the dish. My guys sometimes sleep on their dishes, but always with their butt turned in. >.<
It doesn't really change in other mutations besides greys.With greys I noticed it gets brighter as they reach maturity and then that's it. I also read once that it has a little to do with nutrition.His cheeks are really bright I wonder if Spikes will get that bright?