About the Authors

Ludvík Pinc

Affiliation Department of Animal Science and Ethology, Canine Behavior Research Center, Czech University of Life Sciences, Praha, Czech Republic

Luděk Bartoš

bartos@vuzv.cz

Affiliations Department of Animal Science and Ethology, Canine Behavior Research Center, Czech University of Life Sciences, Praha, Czech Republic, Department of Ethology, Institute of Animal Science, Praha Uhříněves, Czech Republic

Alice Reslová

Affiliation Institute of Criminalistics, Praha, Czech Republic

Radim Kotrba

Affiliations Department of Ethology, Institute of Animal Science, Praha Uhříněves, Czech Republic, Department of Animal Science and Food Processing, Institute of Tropics and Subtropics, Czech University of Life Sciences, Praha, Czech Republic

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LP LB RK. Performed the experiments: LP. Analyzed the data: LB. Contributed reagents/materials/analysis tools: AR. Wrote the paper: LP LB AR.