i got Delawares from Myers last year and love them thay are laying machine's i have 10 hens and one roo and thay look like the bread standard says thay should my question is i have hatched 15 chicks thay are 6 weeks old i was really looking them over this weekend and noticed some of them have a blue look to there legs not all but some and i know no other roo has been with them all of my chicken's are in different pens by bread is this normal are not thanks for any help