I am just wondering how often this occurs? I have a mixture of heritage breeds and they had a few hatch out this last spring that after some research pointed to "Brindle" being the color variety. I keep them all in a mixed enclosure for the winter and then separate into different breeding pens to get my desired breeding results. I am guessing that there was some pre-separation breeding. (I guess that's obvious).
Last years birds included:
Blue Slate
Black
Wild color
Narragansett
Cream
Last years birds included:
Blue Slate
Black
Wild color
Narragansett
Cream