H. Lukanov1*, I. Pavlova2, A. Genchev1 1Department of Animal Science – monogastric and other animals, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria 2Department of General livestock breeding, Faculty of Veterinary Medicine, Trakia University, 6000 Stara Z

M. Panayotov* Department of Animal Science – Non-ruminants and other animals, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria (Manuscript received 11 April 2016; accepted for publication 26 May 2016) Abstract. The goal of the present study was to determine the i