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Pubmed for Handhelds

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  • Title: Extraneous egg shell calcification as a measure of stress in poultry.
    Author: Mills AD, Marche M, Faure JM.
    Journal: Br Poult Sci; 1987 Mar; 28(1):177-81. PubMed ID: 3567686.
    Abstract:
    The incidence of eggs showing abnormal shell calcification amongst those produced by hens kept in individual battery cages, hens kept in battery cages in groups of 3 and hens kept in battery cages in groups of 4 was studied. There was good agreement between observers in the assessment of abnormal eggs. Hens kept in individual cages laid fewer abnormal eggs than hens kept in groups of 3 or 4. There was no significant difference in the incidence of abnormal eggs between hens kept in groups of 3 or 4. The results of this study support the idea that the incidence of eggs showing abnormal calcification may provide a quick and reliable method of measuring stress in hens which lay brown shelled eggs.
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