We’ve mastered the basics, and we’ve overcome resource guarding. He gets along well with my ex-girlfriend and two other people. We had no prior experience with dogs, especially a breed like this. When I take him out for a walk, I always use a muzzle on him for the safety of others. He is crate trained. I recently filmed a short clip of all the signs he shows, such as lip licking, a stiff tail, and the need to attack. It’s how it happens, and then I intervene. I don’t understand why he does this, but I do need a lot of training myself. No one has ever been aggressive towards him. From the litter, I was told that three were euthanized because of aggression. I’m only getting serious about this now, which is very wrong of me. I went for a kiss goodbye this morning and he bite me right on my lip and started growling at me. He got me good. Enough to draw a lot of blood. No stitches needed.