Black pigmentation in feathers of buff Orpington chicks caused by vitamin D deficiency.
D001741:Black or African American; D000818:Animals; D044383:Black People; D002645:Chickens; D005241:Feathers; D006801:Humans; D010858:Pigmentation; D014808:Vitamin D Deficiency
BLACK PIGMENTATION/by vitamin D deficiency; VITAMIN D DEFICIENCY/black pigmentation in chick