Hey guys I have a 5 month old female cane corso who is the most laid back,sweetest puppy I have ever met. She is the perfect puppy considering I have 3 daughters under the age of 6. She hardly ever barks unless she is playfighting with dogs at the dog park. She doesnt bark at people that ring our bell or pass the front of the house---does this mean she is not destined to be a good watch dog? And im not looking for her to maul an intruder-i will take care of that, but im hoping she will at least scare and intruder. Thoughts?