Effect of environmental enrichment on the behavior and welfare of Japanese broilers at a commercial farm

Ai Ohara, Chisako Oyakawa, Yu Yoshihara, Shigeru Ninomiya, Shusuke Sato

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)

    Abstract

    The effect of hay bales and perches as environmentalenrichment materialwas investigated on the behavior, heterophil/lymphocyte (H/L) ratio, footpad dermatitis (FPD), and productivity of Japanese broilers in a commercial farm. About 21,500 birds were allocated to 4 houses: male versus female×controlversus treatment house. We observed maintenance behavior, the utilization of hay bales and perches, and the H/L ratio of birds at 3, 5, and 8 weeks of age. FPD was scored and productivity was calculated at about 60 days after hatching. Compared to birds in the controlhouses, birds in the treatment houses invested more time in stand-resting and moving behaviors (P<0.01, for each behavior) and less time feeding, drinking, and sit-resting (P<0.01, for each behavior). Females used the hay bales and perches more than the males (P<0.1 and P<0.01, respectively). The activity and utilization of hay bales and perches decreased with age (P<0.01, for each behavior, respectively). The H/L ratio of birds in the treatment houses was lower than that in the control houses (P<0.01). The prevalence of FPD was milder in the treatment houses compared to the controlhouses for females (P<0.01), but not for males. In conclusion, hay bales and perches represent effective enrichment materials, allowing broilers to express normal behavior, alleviating stress in the younger and lighter birds of both sexes, and reducing FPD in female birds using the hay bales and perches more than males.

    Original languageEnglish
    Pages (from-to)323-330
    Number of pages8
    JournalJournal of Poultry Science
    Volume52
    Issue number4
    DOIs
    Publication statusPublished - 2015 Oct 25

    Keywords

    • Behavior
    • Footpad dermatitis
    • Hay bale
    • Heterophil/lymphocyte ratio
    • Perch

    ASJC Scopus subject areas

    • Animal Science and Zoology

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