About the Authors
- Bridget M. Waller
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* E-mail: bridget.waller@port.ac.uk
Affiliation Centre for Comparative and Evolutionary Psychology, University of Portsmouth, Portsmouth, Hampshire, United Kingdom
- Kate Peirce
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Affiliation Centre for Comparative and Evolutionary Psychology, University of Portsmouth, Portsmouth, Hampshire, United Kingdom
- Cátia C. Caeiro
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Affiliation Centre for Comparative and Evolutionary Psychology, University of Portsmouth, Portsmouth, Hampshire, United Kingdom
- Linda Scheider
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Affiliation Department of Psychology, Freie Universität Berlin, Berlin, Germany
- Anne M. Burrows
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Affiliations Department of Physical Therapy, Duquesne University, Pittsburgh, United States of America, Department of Anthropology, University of Pittsburgh, Pittsburgh, United States of America
- Sandra McCune
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Affiliation WALTHAM®, Centre for Pet Nutrition, Leicestershire, United Kingdom
- Juliane Kaminski
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Affiliation Centre for Comparative and Evolutionary Psychology, University of Portsmouth, Portsmouth, Hampshire, United Kingdom
Competing Interests
The authors declare that author SM is an employee (Research Manager) of WALTHAM, a division of Mars Inc. All other authors have declared that no competing interests exist. This does not alter their adherence to all the PLOS ONE policies on sharing data and materials.
Author Contributions
Conceived and designed the experiments: BMW AMB JK. Performed the experiments: KP CCC LS. Analyzed the data: BMW. Contributed reagents/materials/analysis tools: AMB. Wrote the paper: BMW JK. Assisted with study design: SM.