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  • Title: Restricted feeding and broiler performance: age at initiation and length of restriction.
    Author: Ballay M, Dunnington EA, Gross WB, Siegel PB.
    Journal: Poult Sci; 1992 Mar; 71(3):440-7. PubMed ID: 1561210.
    Abstract:
    Broiler cockerels were provided either ad libitum access or restricted to alternate-day access to feed initiated at different ages and lasting for different durations. Regimens consisted of ad libitum feeding; alternate-day feeding; alternate-day feeding from 0 to 6, 6 to 12, or 12 to 18 days of age (DOA); alternate-day feeding from 0 to 12, 0 to 6, and 12 to 18, or 6 to 18 DOA; and alternate-day feeding from 0 to 18 DOA. By 39 DOA, chicks restricted for only one 6-day period reached body weights equivalent to those of chicks eating ad libitum. Body weights of chicks restricted for more than 6 days during the first 18 days after hatch were lower than those of chicks eating ad libitum at 39 DOA. Restriction for more than 6 days improved feed efficiency. Chicks restricted for the whole experiment had superior feed efficiency but low body weights. Antibody responses to sheep erythrocyte antigen were similar among feeding regimens. Response to Escherichia coli inoculation was generally less severe in chicks provided restricted access to feed, and overall mortality was highest in chicks eating ad libitum. Feeding regimens had little effect on organ weights relative to body weight, amount of abdominal fat (either on an absolute basis or relative to body weight), or percentage lipid in the abdominal fat pad.
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