Well, I noticed it not too long ago, I like the look of my chickens eyes. When my chickens hatch most of them usually have greyish green eyes, and then when they get older they get the orange or brown/black eye color. Here are some pictures. This is Roscoe, my rhode island red Rooster. He has green eyes in this picture. I don't have any recent pictures of Roscoe, but his eyes have changed, but here's a picture of an adult rhode island red rooster.