This is very much a matter of personality combined with experience. For any individual dog, it is a question that must be tested to find the answer. Be sure that the test is supervised at all times.Try using the X-pen to introduce your new Frenchie to other dogs. While they are protected, get your other dog’s reaction and the Frenchie’s response. Sooner or later, a puppy may attempt to establish dominance in some cases with smaller or more submissive dogs.