I.G. Penchev Department of Morphology, Physiology and Nutrition, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria (Manuscript received 22 February 2019; accepted for publication 25 April 2019)   Abstract. The aim of the present research was to study the ch

D. Pamukova* Department of Animal Science – Ruminants and Dairy Farming, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria Abstract. The investigation was performed with industrial batches of merino wool originating from Bulgaria (1), Russia (2), Romania (2), Spai