Please read this first scientific research about wolfdogs, which a russian Prof. Dr. called Iljin made in the 1920ies. He published it in 1941. The funny thing is that he mentioned a lot of german researchers of wolfdogs in that paper! But it is more genetic and morphologic and almost no behaviour like.
http://www.wolfdogforum.com/forum/vi....php?f=11&t=89
By the way, did you knew that in russian in that time already black wolves were seen? And not only black, but there was an area were blue wolves were! I only know american blue wolfdogs.