[1] Univ Melbourne, Anim Welf Sci Ctr, Parkville, Vic 3010, Australia
[2] Rivalea Australia Pty Ltd, Corowa, NSW 2646, Australia
[3] Agr Victoria Res, Biometr Team, Dept Jobs Precincts & Reg, Hamilton, Vic 3300, Australia
[4] Univ Vet Med, Inst Anim Welf Sci, A-1210 Vienna, Austria