Some Bernese Mountain Dogs, particularly young males, are willful and dominant (they want to be the boss) and will make you prove that you can make them do things. Some Bernese males are also dominant or aggressive toward other male dogs. Shedding. A big Yes! Bernese Mountain Dogs shed a goodly amount. Potential slobbering. Some Bernese Mountain Dogs, especially those with massive heads and loose lips, slobber and drool, especially after eating and drinking. Potential health problems. The ...