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  • Title: Response of early and late feathering broilers to various stressors.
    Author: Dunnington EA, Siegel PB, Katanbaf MN, Gross WB.
    Journal: Poult Sci; 1987 Jan; 66(1):168-70. PubMed ID: 3575233.
    Abstract:
    Growth and responses to potential stressors were measured in early (k+) and late (K) feathering chicks from a common commercial broiler parent stock. Body weights were not different at 3, 10, or 49 days of age with ad libitum feeding, but K/K cockerels were heavier than k+/k+ ones at 24, 38, and 52 days of age with alternate day feeding. No differences in heterophil:lymphocyte ratios were found between K/K and k+/k+ individuals whether they were moved to a new environment or remained in familiar surroundings. Antibody response to sheep erythrocyte antigens was not different in K/w and k+/w pullets. Typical husbandry procedures that might be considered as mild stressors did not elicit physiological stress responses in these meat-type chickens.
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