Outdoor use, tonic immobility, heterophil/lymphocyte ratio and feather condition in free-range laying hens of different genotype

Author： Mahboub H.D.H. Müller J. Von Borell E.

Publisher： Taylor & Francis Ltd

ISSN： 1466-1799

Source： British Poultry Science, Vol.45, Iss.6, 2004-12, pp. : 738-744

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