BEHAVIORAL AND VOCAL CHARACTERISTICS OF LAYING HENS^UNDER DIFFERENT HOUSING AND FEEDING CONDITIONS - N. Y. Kim; S. Y. Jang; S. J. Kim; B. T. Jeon; M. R. Oh; E. K. Kim; H. J. Seong; Y. J. Tang; Y. S; Yun 1^and S. H. Moon1 (Journal of Animal and Plant Sciences, 2017)