Black Russian Terrier brought up from puppyhood in a house with cats becomes accustomed to them and shows no signs of aggression towards them.
However, it is necessary to supervise the puppy's contacts with cats during the first days in the new house. The black terrier is very intelligent and has an excellent memory. If it is attacked by a cat (usually by hitting the dog's nose with its paw) while trying to make friends, it can remember the incident and may want to retaliate in the future.