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Related Experiment Video

Updated: Apr 30, 2026

Tickling, a Technique for Inducing Positive Affect When Handling Rats
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Gentle human interactions trigger positive emotions in chicks.

Javiera Calderón-Amor1,2, Bassam Alhawas3, Tamara Tadich4

  • 1Universidad Austral de Chile, Chile.

Animal Welfare (South Mimms, England)
|April 24, 2026
PubMed
Summary
This summary is machine-generated.

Chicks associate gentle human handling with positive emotions, preferring areas where they received it. This suggests human-animal interactions can be rewarding for poultry, impacting welfare practices.

Keywords:
Affective stateGallus gallus domesticusanimal welfareconditioned place preferencegentle handlinghuman-animal interaction

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Area of Science:

  • Animal Behaviour
  • Affective Neuroscience
  • Poultry Science

Background:

  • Early life human interaction significantly impacts animal behavior, stress, and welfare.
  • The emotional perception of gentle handling by animals, especially poultry, remains poorly understood.

Purpose of the Study:

  • To investigate whether chicks (Gallus gallus domesticus) experience positive emotions from gentle human handling.
  • To assess the associative value of gentle human contact using a conditioned place preference paradigm in poultry.

Main Methods:

  • A conditioned place preference (CPP) paradigm was employed with 20 Hy-Line W-80 chicks.
  • Chicks were exposed to conditioning chambers paired with either gentle handling or neutral human presence.
  • Preference was assessed by measuring time spent in each chamber post-conditioning over three days.

Main Results:

  • Chicks consistently spent significantly more time in the chamber associated with gentle handling.
  • No aversion was observed towards the neutral human presence chamber.
  • Gentle handling acquired positive associative value, indicating it was perceived as rewarding.

Conclusions:

  • Gentle human contact serves as a rewarding stimulus for poultry chicks.
  • These findings support the positive impact of human-animal interactions on poultry welfare.
  • Results have implications for improving husbandry practices and welfare assessment in poultry farming.