Hi! I am having trouble identifying these 1-week old chicks. I have four of them. They are all black (except a touch of yellow on the face) with grey wings. The wings have black and white markings. And they have grey feathers (with the same black & white markings) on the feet. I assume they have to be either marans, cochins, or dark brahmas. But they are entirely black--no yellowing on the belly--which does not match any of the chick photos I am seeing online for these breeds. They also are not black silkies in that they only have four toes. What do you think they are? Thank you!