8, 37075 Göttingen, Germany; Jissels@gwdg.de 4 Institute for Physiology, University of Veterinary Medicine Hannover, Foundation, Bischofsholer Damm 15, 30173 Hannover, Germany; Gerhard.Breves@tiho-hannover.de 5 Clinic for Ruminants and Swine, Faculty of Veterinary Medicine, University of Leipzig...