title: Movement of flocks of laying hens in and out of the hen house in four free range systems.
authors: N E
authors: NE
authors: Bubier
authors: R H
authors: RH
authors: Bradshaw
mesh_terms: D000822:Animal Husbandry / Q000379:methods*; D000827:Animal Welfare; D000818:Animals; D002645:Chickens / Q000502:physiology*; D003441:Crowding; D005260:Female; D006799:Housing, Animal; D008124:Locomotion