Belgian Malinois power can be stopped with one word from owner

Peaches is much smaller than Cowboy. But she is 3 years old, Cowboy is still a clumsy puppy. He will be 1 year old the end of this month. They play so rough with each other but all it takes is one word from me to stop the rough housing or in this case to leave something like the armadillo carcass alone.