Assessment of pupillometry across different commercial systems of laying hens to validate its potential as an objective indicator of welfare
Elyse Mosco, David P. Kilroy, Arun H. S. Kumar
This study validates the IP ratio as a non-invasive indicator of welfare in laying hens, showing it is influenced by housing systems but not light or age.
Poultry · Jul 15, 2025Peer-reviewedPhysiology