The Czechoslovakian Wolfdog (or Vlčák-Vlčiak) is a relatively new breed of dog that traces its original lineage to an experiment conducted in 1955 in Czechoslovakia. After initially breeding 48 working line German Shepherd Dogs with 5 Eurasian wolves a plan was worked out to create a wolf-dog hybrid that would have the temperament pack mentality and trainability of the German Shepherd Dog and the strength physical build and stamina of the Eurasian wolf.