Interesting, your fertilized egg yielding two chickens. Yesterday here in New Zealand, I opened 3 eggs, knowing they were late, and most probably dead. Two were normal lavender araucana chicks, but the third yielded a black and a lavender chick fro mthe same egg. It was a large one, same size as the other two singles, definitely not in the usual double yolker range, of which I have one that I prepared as a blown egg a few months earlier.
It is interesting, these chicks were much smaller naturally, but just as much formed as the other two normals, dying in the shell at about day 18, - 3 days before hatch time, and that day we experienced a power failure, which I had thought was only 20 minutes, but now hubby tells me it was more than an hour. I had had 5 eggs in a hovabator, and that day 18 had candeled them, wondering why one egg has such a tiny air sac, now I see it has a sac each end, for each chick.
Tell me , did your chicks hatch out live, and if so, how are they doing now - what age. Would you have any photos, also, what breed. I am very very intrigued. Ruth