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Related Experiment Videos

Physiological changes in caged layers during a forced molt. 2. Gross changes in organs.

J Brake, P Thaxton

    Poultry Science
    |May 1, 1979
    PubMed
    Summary

    Forced molting in White Leghorn hens significantly reduces body weight and the weights of the liver, ovary, and oviduct. This common poultry management practice causes a pause in egg production but has no consistent effect on adrenal or spleen weights.

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    Area of Science:

    • Poultry Science
    • Animal Physiology
    • Avian Reproduction

    Background:

    • Forced molting is a common practice in commercial poultry production to extend the productive lifespan of laying hens.
    • Understanding the physiological effects of forced molting is crucial for optimizing hen welfare and productivity.

    Purpose of the Study:

    • To investigate the impact of forced molting on body weight and organ weights in White Leghorn hens.
    • To determine the duration and extent of physiological changes following forced molting procedures.

    Main Methods:

    • White Leghorn hens were subjected to forced molting using reduced daylength and feed/water withdrawal.
    • Body weight and absolute/relative organ weights (liver, ovary, oviduct, adrenal, spleen) were measured over varying periods (up to 56 days) across four trials.

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    Main Results:

    • Significant decreases in absolute and relative weights of the liver, ovary, and oviduct were observed.
    • Consistent reduction in overall body weight was noted.
    • No consistent trends were found for the absolute or relative weights of the right adrenal gland or spleen.

    Conclusions:

    • Forced molting significantly impacts key physiological parameters in laying hens, particularly reproductive organs and body mass.
    • The observed organ weight changes suggest a resource reallocation during the molting period.
    • Adrenal and spleen weight responses were variable, indicating a less direct or consistent impact of this molting protocol on these organs.