This is my first dog, Bear, who I adopted when I turned 13. He is very sweet, but tries to defend me at the wrong times. He grows at the neighbors when they try to come near me, but when I'm not around he lets them pet him without any fight. I am worried he will hurt someone- or be hurt by someone- and try not to take him many places (we are working on his growling and biting problem). He did, however, try to bite me the first day we came home. He hasn't so much as growled at me since that first day, but I still watch for any signs of aggression. Other than that- he is a total sweet heart if he knows you and is very obedient.