About the Authors

Annette Zeyner

annette.zeyner@landw.uni-halle.de

Affiliation Institute of Agricultural and Nutritional Sciences, Group Animal Nutrition, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany

Kristin Romanowski

Affiliation Chair for Nutritional Physiology and Animal Nutrition, University of Rostock, Rostock, Germany

Andreas Vernunft

Affiliation Leibniz Institute for Farm Animal Biology, Dummerstorf, Germany

Patricia Harris

Affiliation Equine Studies Group, Waltham Centre for Pet Nutrition, Waltham-on-the-Worlds, United Kingdom

Ann-Marie Müller

Affiliation Chair for Nutritional Physiology and Animal Nutrition, University of Rostock, Rostock, Germany

Carola Wolf

Affiliation State Office for Agriculture, Food Safety and Fishery Mecklenburg-Western Pomerania, Rostock, Germany

Ellen Kienzle

Affiliation Institute of Physiology and Animal Nutrition, Ludwig-Maximilian University Munich, Munich, Germany

Competing Interests

“Consumables from the research were funded by WALTHAM Centre for Pet Nutrition. This does not alter our adherence to PLOS ONE policies on sharing data and materials.”

Author Contributions

Conceptualization: AZ. Data curation: AZ KR. Formal analysis: AZ KR AMM. Funding acquisition: AZ. Investigation: KR AMM AV AZ. Methodology: AZ. Project administration: AZ. Resources: AZ AV CW. Supervision: AZ. Validation: AZ KR AMM CW. Visualization: AZ EK PH KR. Writing – original draft: AZ EK PH KR. Writing – review & editing: AZ EK PH.