The "showgirl" cross breed may be translated as les danseuses de cabaret, perhaps. They were given this name because it looks like they are wearing a feathered headdress costume. They may also be called a "Silkie avec le cou nu"
Here is an update: I just looked at your website and learned...
Bonjour Isabelle,
I enjoyed seeing our photos on your French site. I also liked learning the parts of the chicken en Francais. I have more to share.
My Blue Cochin hens have French names. Here is Collette.
Here is Siegfried. He is a "Showgirl" which is a cross between a Silkie and a...
Bonjour, your French site is very nice. Here are two photos:
Buff Orpington (We use the word breed in the Unitied States.)
Blue Cochin, Buff Orpington and Golden Laced Wyandotte
My name is Jill.