32. Black Russian Terrier

These strong dogs are made up of muscle and fur. But don’t let their thick, fluffy coat deceive you! Russian Black Terriers are strong dogs renowned for their intelligence and self-assurance. The Russian Black Terrier might make a good house companion because they have a long history of being taught to guard and protect at all costs. However, things alter when there are young children present. They can weigh up to 140 pounds, and because of their size, they run the risk of inflicting self-inflicted injury. They are not to be taken lightly, if there is one thing you should be aware of.