Duration of tonic immobility affected by housing environment in White Leghorn hens.
Duration of tonic immobility, recognized as a criterion of fearfulness, was greater for hens kept in 17-bird cages than for hens kept in floor pens, single bird cages, and 5-bird cages.
D000818:Animals; D002645:Chickens / Q000235:genetics / Q000502:physiology*; D005239:Fear / Q000502:physiology; D005260:Female; D005430:Floors and Floorcoverings; D006799:Housing, Animal; D009043:Motor Activity / Q000502:physiology*; D012924:Social Conditions