I got 15 pullets from a local feed store. They came from Mcmurry hatchery and were supposed to be from their brown egg layer assortment. I am pretty sure I know the breeds of all the others but do not know these 4. Anybody have any ideas? All these birds should be three weeks old. The two birds in the first three pictures both have dark shanks and similar combs. When I originally got them the lighter colored one was silver and the darker one was dark gray. The two birds in this last picture looked identical when I first got them and i assumed they were of the same breed. Now that they are older, I can see the color patterns on their plumage is different and their combs are different. What do you think?