Understanding Chicks' Emotions: Are Eye Blinks & Facial Temperatures Reliable Indicators?
N. Pijpers, H. v. d. Heuvel, I. J. Duncan, J. Yorzinski, S. Neethirajan
This study measures eye blinks and facial temperatures in chicks to assess affective states and finds that eye temperature and blinking rate decrease, while head and beak temperatures increase in response to stress.
bioRxiv · Jan 31, 2022 · PreprintAnimal Behavior & Cognition