Odin doesn't have too much issue when we are walking, but don't try to come into my house without permission. He does, however, have a problem with other dogs getting in his "personal space" - like dogs with poor social skills. It's more like the owners that rush up with their dogs "ooooh, do you want to say hi?!?" He usually gives a growl (& sometimes a nip) to let them know they need to back off. Just a thought about your search for a breeder... Odin came from Centurion Boerboels in Atlanta, GA. The breeder is Kerri Dale. I am very pleased with her. I had pretty much constant contact with her throughout the entire process. She sent email updates & pics of mom & pups every week. (I was able to put together a really cute puppy/baby book. LOL) I told her that I wanted a male, & she should choose the best one for me. It needed to fit in with the other members of our family: a senior dog, 2 cats -1 is deaf, and my daughter. She picked out the male for me, & he really does fit perfectly. I couldn't have done better myself.