I recently bought some Silkie and serama hatching eggs from a lady I know. Well she shipped them to me and I set them 24 hours later. I candle day 4 and 5 to check for any eggs that HAVE to be culled. Well day 5, and I noticed that one of my eggs (single yolk) has two separate embryos growing. Two different eyes and two different hearts. Has anyone ever seen this? I know it's nearly impossible for twins to even develops beyond day 7. But I'm curious how these will do. I thought I was imagining the other embryo but nope.