We all need a good dog.  There is no such thing as a bad dog.  Only bored dogs.  Owners are usually the issue, as a poor owner does not teach their pet the most important rules they need to know.  Amazingly enough, I've seen some of the toughest dogs be an absolute adorable and caring pet around children and older people.  Even ones that are there to guard.  Mainly due to great trainers.

A police dog in Michigan USA was seen at a rest area along the side of the highway running freely in the back area.  (note: that it is not a designated pet area).   The officer explained that this is not just a dog, it is a police officer.  The dog was told it can go do its business but needs to check the area.  Thats exactly what it did.  Visually and with its nose, it went all around the designated space and returned professionally.  Good job officer!