Utilization of the carotene of hay by horses.
D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D002338:Carotenoids / Q000097:blood / Q000378:metabolism*; D006736:Horses / Q000378:metabolism*; D014801:Vitamin A / Q000097:blood
D014801:Vitamin A; D002338:Carotenoids