They are not a recognised breed. They are suppose to be birchen pattern base. I found two kinds of birchen in the group I ordered. The Extended black birchen is used often and as much as regular birchen for a birchen line. Differant recognized breeds have a differant standards for thier...
The Iowa blues I have are birchen pattern on E , so if they get any melinizers mixed into them it will wipe out the birchen pattern in the females and turn them black. E based birchen females dont have markings on the top of the head , only the back of the neck and no laceing on frontal neck...
They are not a sexlinked breed. They can sex them by the wings when they hatch, but they are not a sexlinked breed by the true definition of sexlinked. Sometimes the ones with extra white on the face are males, but it is not a sure thing and those with just a white chin can still be males...
Well the breed is unrecognized by the APA . So in many respects they are open game. The only thing to do is to find some well colored birchens and cross in and retain the best. Or hatch out a large number and cull heavy with the ones you have purchased. Try to find out what the original...
I purchased some Iowa blues from Brown Egg Layers in Calif.
11pullets and 3 roosters------ 'only one pullet is any good and she still needs some work. One of the 3 roosters was overly marked and green yellow instead of silver. Most of the pullets had poor silver necks, more yellow green...