South African Journal of Animal Science

South African Society for Animal Science

Agricultural Research Council of South Africa

Department of Animal and Wildlife Sciences of the University of Pretoria

http://www.sasas.co.za

Copyright resides with the authors in terms of the Creative Commons Attribution 2.5 SouthAfrican Licence. See: https://creativecommons.org/licenses/by/4.0/ Users may copy, distribute, transmit and adapt the work, but must recognise the authors and the South African Journal of Animal Science.

Four: May, August, November, next year February