I have a Black Copper Marans Rooster that is about 3 months old. The pupil of his eye looks like someone took a dropper of ink and dropped it onto the colored part of his eye. Instead of a round pupil, his is irregular at the edges like when ink or watercolor runs on a page. Is this a "defect" or is this normal for the breed? He does not have any problems seeing but he looks freaky if you look at his eyes up close. None of my other chickens have eyes like this.