The Italian hen is just a variation, like some ppl are more tan as others, as far as I experienced.
I just thought about it and looked more intensiv in the pic... and just think it can be more a Pansy/Italian mix[...]...
The brown one is very interessting, but unfortunately I have no specific genetic explaination, ... only that extended brown is incomplete dominant and something uncommon is mixed with it. But really nice!
Me: "Ya a mutt Scrappy"