About the Authors

Rebecca A. Strong

Affiliation Department of Animal Sciences, Purdue University, West Lafayette, Indiana, United States of America

Patricia Y. Hester

Affiliation Department of Animal Sciences, Purdue University, West Lafayette, Indiana, United States of America

Susan D. Eicher

Affiliation Untied States Department of Agriculture, Livestock Behavior Research Unit, West Lafayette, Indiana, United States of America

Jiaying Hu

Affiliation Department of Animal Sciences, Purdue University, West Lafayette, Indiana, United States of America

Heng-Wei Cheng

Heng-Wei.Cheng@ars.usda.gov

Affiliation Untied States Department of Agriculture, Livestock Behavior Research Unit, West Lafayette, Indiana, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PYH SDE H-WC. Performed the experiments: RAS JH H-WC. Analyzed the data: RAS JH H-WC. Wrote the paper: RAS PYH SDE JH H-WC.