I was wondering if anyone could shed some light on a behavioural issue I seem to be having with my malamute. He is just 1 year and very playful. He wants to be everyone’s friend and play with all dogs. As with most mals he has selective hearing and recall is scetchy when others are around but usually after making a pain of himself he comes back. He is a little in your face and has no concept of personal space but a loving dog. However there is a puppy that he encounters on our walks from time to time he has taken a disliking to. For some reason this puppy Rottweiler is cute and tiny and hides from my mal because as soon as he sees him he growls and gets all aggressive with him. I wouldn’t say aggressive but definitely funny with him. He has never bitten and only growls (playfully) with us at home, this is different though. He makes the growls like when I try and push him off the bed. Asserting dominance. Why this one puppy? I do have to work on his understanding of personal space as not to worry other dogs but generally he just wants to play. What can I do to remedy it. He’s not like this with any other. Obviously I try to keep him away from the other puppy but will it become more?