1. Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari, 70124 Bari, Italy
2. Animal Behaviour, Cognition and Welfare Group, School of Life Sciences, University of Lincoln, Lincolnshire LN6 7TS, UK
3. Department of Agricultural and Food Sciences, University of Bologna, 40127 Bologna, Italy
4. Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, New York, NY 14850-9535, USA