Every puppy from our kennel is taught to settle physiological needs outside, on the grass. As soon as the puppy wakes up, you should go with him to the lawn as soon as possible. However, we must remember that it is still a little kid and sometimes a "toilet accident" will happen at home.
Black Russian Terriers are very intelligent so if the puppy is regularly taken outside as soon as he wakes up, nothing more should happen in the house than a "pee" from time to time, less and less with age.
A black terrier puppy will take care of its needs on the lawn very quickly, usually as soon as it steps on the grass.