This is Pup. Pup is 2 and I've had him since May. Whenever he sees a human that isn't a full adult he growls and gets VERY aggressive. Same with other dogs. I fear that someday I accidentally let go of the leash and he hurts someone badly. I love him so much but I'm clueless to what to do, all my dogs before him were nice and wouldn't hurt anyone. Also, he hates anyone that doesn't have dog experience. Whenever I invite new friends over I tell them "Don't look at him, pretend he doesn't exist. Don't be still. Be confident. Don't flinch! He won't hurt you." but whenever they show that they're scared, he gets aggressive. Help, /an/.