Hello guys! I bought some frozen rats online. Most of them are white, but a few weaned size rats are black. May I know is it normal and are the black ones also captive bred? The smaller size rats or mouses I bought were always pure white. I also saw some rats with different color like brown head or something from reptile expo in the past, are all these normal? Why they have different colors? And where do you guys buy frozen rats online? May I have some recommendation or warning? Thank you so much!