Ok this is my first time incubating chicks in my home made incubator, today is day 4 and I'm excited to say that after candling today all of my eggs are veining!

But, this one is different. It seems to me like a double yolk, but all of the pictures I've googled look different from this. You can see the veining on the top yolk, and I *think* I can make out a dark spot on the bottom one (they are both the same color btw, the bottom one isn't really darker than the top one-camera wouldnt focus well). Any thoughts?