From the time Prince was 9 months old, he put on a good show for the mailperson, UPS man, and anybody approaching or passing within ear/eye-shot of his kingdom. I used to doubt he would bite. He's 2 yrs old now, and believe me its not just a show anymore! He is very defensive, he spreads his front legs,lowers his head and shows his teeth. When unfamiliar family visits we crate him until the over-zealous hugs and kisses are over, and then we introduce him to them. My uncle walked up on my daughter from behind once, Prince heard her shriek, my uncle is so glad Prince was in his crate. When we go on walks at the regional park I walk him away from the trail, nobody wants to pass to close. When they ask me, "does he bite?" I just say, "He's got teeth!" :D