1. Animal Physiology and Health Research Unit, Faculty of Agronomy and Agricultural Sciences, University of Dschang, Dschang 222, Cameroon
2. Department of Veterinary Medicine, Faculty of Agriculture and Veterinary Medicine, University of Buea, Buea 63, Cameroon
3. Department of Animal Sciences, Faculty of Agriculture and Veterinary Medicine, University of Buea, Buea 63, Cameroon