1. 1Department of Poultry and Fur Animal Breeding and Animal Hygiene, University of Agriculture in Krakow, Al. Mickiewicza 24/28, 30-059 Kraków, Poland
2. 2Department of Cattle Breeding, University of Agriculture in Krakow, Al. Mickiewicza 24/28, 30-059 Kraków, Poland
3. 3Institute for Animal Husbandry, Autoput 16, 11080 Zemun, Republic of Serbia
4. 4Department of Animal Product Technology, Faculty of Food Technology, University of Agriculture in Krakow, Balicka 122, 31-149 Kraków, Poland