1. J. S. Neils:
Department of Animal Production, Adamawa State University, Mubi, Nigeria
2. A. K. Bsackey:
Faculty of Veterinary Medicine, Ahmadu Bello University, Zaria, Nigeria
3. U. S. Abdullahi:
Faculty of Veterinary Medicine, Ahmadu Bello University, Zaria, Nigeria
4. K. A. N. Esievo:
Faculty of Veterinary Medicine, Ahmadu Bello University, Zaria, Nigeria