"Tail-end" lambs.
D000818:Animals; D000831:Animals, Newborn; D001724:Birth Weight; D001835:Body Weight; D000013:Congenital Abnormalities / Q000662:veterinary; D005260:Female; D006801:Humans; D007775:Lactation Disorders / Q000662:veterinary; D008297:Male; D008423:Maternal Age; D011247:Pregnancy; D011270:Pregnancy, Animal; D011272:Pregnancy, Multiple; D012621:Seasons; D012756:Sheep