What were the Black Russian Terrier and the Samoyed dog breeds used for?
Black Russian Terrier:  The contemporary Black Russian Terrier is a working dog, guarding dog, sporting and companion dog. Samoyed (dog):  These nomadic reindeer herders bred the fluffy white dogs to help with the herding, and to pull sleds when they moved.
working dog, guarding dog, sporting and companion dog.