title: Ethological approach to farm animal behavior research.
mesh_terms: D000220:Adaptation, Biological; D000383:Agriculture; D000818:Animals; D000829:Animals, Domestic; D000831:Animals, Newborn; D001522:Behavior, Animal; D005075:Biological Evolution; D004777:Environment; D012106:Research; D013552:Swine / Q000502:physiology; D014886:Weaning