Kristy, my little village always has something interesting going on. I have some oversized eggs (larger than normal cockatiel eggs) that I candled, and they didn't look double yolk when candled, but might be a possibility of fraternal twins in the egg. I sure hop not because from past experiences 2 embryos sharing the same yolk have a slime chance of sucessfully hatching , whereas with 2 yolks the sucesses are higher. I'm hoping they just hatch out to be one large baby per egg.