Puppies of the first generation resembled the wolf in appearance and behavior. Their upbringing was difficult; training was possible, but the results hardly matched the effort. In adulthood, they were again bred with German Shepherd-Dogs, decreasing the proportion of 'wolf-blood' to 6.25% in the fourth generation. Most individuals of the third and fourth generations were able to attend a normal course and could be placed in a service performance. Compared with dogs they had better navigational skills, night vision, hearing, and sense of smell. In tests of endurance, hybrids finished the entire 100 km route without being exhausted.
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