Well my co is almost 2 years.He is very very social with dogs.We walk in the parc and meet almost 40 dog every week and he is never agressive.He is dominant but when a dog attack him he just push him the other way and most of the time the other dog feels that he is a pritty though guy.He doesnt fight for himself but when my chi is with me and a dog wants to go after her he growls and step between and i guess when the dog keeps doing it he will attack him )never heppend because most of the time his attitude says enough. He is friendly towards kids and even men can pet him in the parc when he is without a leash and is free to go.Walking in my neighbourhoud he is protective and men can not come close )but i dont want them to come close either'.Same in my car when people come close in the dark he stare and growls and will not let you in but well that is one of his duties :D When there is anger or agressive behaviour from people than you have a problem because than he is very agressive protective. I can introduce you in my house but he will always watching you.Stare at you and doesnt realy accept you.And when you come in i have to put my chihuahua away because he react very strong when she barks alarm. http://security-dog.org/gold-star/kennel_dr/inar/inar.html My great friend who turns out in a wonderful dog :D :D