1 Department of Veterinary Sciences, School of Agrarian Sciences, University of Trás-os-Montes and Alto Douro, UTAD, 5001-911, Vila Real, Portugal; Center for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes and Alto Douro, UTAD, 5001-911, Vila Real, Portugal. Electronic address: pamo@utad.pt.
2 Department of Veterinary Sciences, School of Agrarian Sciences, University of Trás-os-Montes and Alto Douro, UTAD, 5001-911, Vila Real, Portugal; CECAV, University of Trás-os-Montes and Alto Douro, UTAD, 5001-911, Vila Real, Portugal. Electronic address: fseixas@utad.pt.