that was really cute, i was walking Volka my CAO not even 6 months old but pretty big ..and very very friendly with everybody, as i was walking him at night we just went in a private parking lot .. and as i was pulling volka to get out....suddenly a guy (he is a worker who takes care of the parking lot and he lives there in a room) came out of his room and said to me in a rather aggressive voice: Who authorized you to came in here??? then Volka who is friendly to everybody , just exploded towards him , i had to pull him back as hard as i can , and he started barking with the deepest and loudest bark i have ever heard, ..so i told the guy to go back in his room coz i cant hold the dog for long,..so he just ran in his room slammed the door and locked it....then volka was really proud of himself and i was laughing like hell....i guess his protective instincts are starting to develop!