I started a post a little while back about my 2 babies that have changed colors, 1 of them did exactly as yours and it's been 6 months with no change back.. My Larger Girl has been breeding Great but she didn't do the same change, she turned a Yellow color with alot more Blck Flaking.. Someone suggested she might be an IMG so Illoked it up and Found Ralph Davis's Dirty Joe, shes an exact copy.. Nothing's been proven though, mostly due to the fact that the Babies are all born normal and don't change colors until they start to reach Maturity..