I just did my second hatch and ended up with three different varieties (there was only supposed to be one). I opened the eggs that didn't hatch. Some I feel should have hatched, they were fully formed and seemed ready to pip. But my surprise came when I opened an egg and there were twins but the twins were two different colors. One was black or dark brown and the other one yellow. I am new to this and know that twins hatching are like winning the lottery but why two different colors?