I have a 5 month old puppy and have had him since he was 9 weeks old! He’s a miniature dachshund. He sometimes barks at strangers and runs away when they go towards him and then he goes back towards them when they turn away. He doesn’t bark every time but he will always run away and then go back and repeat this. How do I get him to stop doing this and be happy to go to people and not bark or at least relax?