I received a little more information from the breeder about the chickens.
She has two pens of Ameraucanas. One pen is Blue/Black/Splash which she bought the eggs from jean about a year ago. The other pen is Blue/Splash which she got from a lady named Pat in Josephine, TX about three years ago.
I bought the eggs from her Blue/Splash pen on eggbid last spring, so the eggs are not from jean, but from the other pen.
This person says she has never owned Silkies and has not crossed them with her birds. She says she has hatched many of her own eggs and has never seen the sillkie feathering come of her eggs, nor has anyone she sold eggs to ever told her about having silkie feathered chickens. She was amazed when I sent her the picture of my chickens.
So I still don\'t know where the silkie gene came from, but was able to narrow it down a little further.