Yea, or hybrid crossing a purebred too I would guess...like a red sex link mixed with a barred rock, etc. etc. It sucks kinda that I don't know what mine are mixed with...and the fact that there is no way to sex I.D. them until they are either crowing or laying eggs.
yes pure X Hybrid
I do that all the time
last year I crossed RSL But UK version called Warren with a Cream Legbar
and Leghorn Hybrids X Cream Legbar
and this year Leghorn Hybrids X Lav Araucana
and Lav Araucana X Warrens
they give some great EE style Green Egg Layers but look like standard Chicken without the beard
very nice
although they do get a real lovely Crown