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A comparison of inversion test holding methods for broilers.

A Perretti1, S Weimer1

  • 1Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA.

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|August 17, 2024
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Summary
This summary is machine-generated.

Broiler fear responses during the inversion test differ based on how birds are held. Holding by the feet increased wing flapping and attempts to right compared to holding by the shanks.

Keywords:
behaviorbroilerfearinversion testmethod

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Area of Science:

  • Animal behavior
  • Avian welfare
  • Poultry science

Background:

  • Assessing poultry fear is crucial for improving research and welfare.
  • The inversion test is a standardized method for measuring fear in poultry.
  • Handling techniques can influence fear response measurements.

Purpose of the Study:

  • To investigate the impact of two distinct holding methods (shanks vs. feet) on broiler fear responses during the inversion test.
  • To determine if holding technique affects specific fear behaviors like wing flapping, head movement, righting attempts, and vocalizations.

Main Methods:

  • Broiler chickens (N=80) at 15 and 34 days of age were subjected to the inversion test.
  • Birds were held by either their shanks or feet for 30 seconds.
  • Fear behaviors were quantified from video recordings, including wing flapping, head movement, righting attempts, and vocalizations.

Main Results:

  • Holding by the feet significantly increased wing flapping and attempts to right on both D15 and D34 compared to holding by the shanks.
  • Head movements were greater when birds were held by their shanks on D15.
  • Vocalizations were higher at D15 than D34, irrespective of the holding method.

Conclusions:

  • The method used to hold poultry during the inversion test significantly influences observed fear behaviors.
  • Standardization of handling techniques is essential for reliable and repeatable fear assessments in poultry research.
  • These findings contribute to refining methodologies for evaluating avian welfare.