No huge differences between this week and last, but here's Victor/Victoria. The shoulder feathers are coming in, and are different colors on either side as expected.
The father is the frizzle in photos 4 and 5, and the mother is the pullet in photo 7.
Both are supposed to be sex linked chocolate based. They seemingly both carry recessive white AND silkie feathering genes. I just don't know what I'm going to get get out of them at any given moment.
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The folks at the University of Edinburgh are still trying to figure out HOW these birds occur. There are a few theories. It was believed that they have more than one father but according to one or two other BYC members who hatched gynandromorphs, they had only two possible parents. At any rate, it is extremely rare that the parents are known since most gyandromorphs appear in hatcheries that hatch hundreds of thousands of chicks. Also, there is no known documentation of any being raised from a chick, reporting changes that occur and photos. You and I appear to be the first.
Dr Hollander studied this in pigeons. They are called Mosaics, caused by the egg being fertilized by two sperm at the exact same time. It could be more common than thought because if both sperm carried the same color genes it would look normal. A friend of mine had a cockerel that was BBR and yellow legged on one side and GDW and green legged on the other. He took pictures up to about a year old when a hawk killed it. Tom