I'm posting again because I didn't get many responces to why there is no information what so ever on the Basque Hens. Does anybody got any clue to why?
Here's a place to start: https://www.backyardchickens.com/t/510045/euskal-oiloa-basque-thread/3571
and http://www.euskaloiloas.com/
There's a group working on APA SOPs for the Marraduna and Gorria varieties. Follow the link from the 2nd link. They are pretty birds.