Sometimes it can be confusing with dogs in general but especially with Northern breeds. Is your dog a malamute? I am assuming so because of the article~! Especially as puppies, they have a lot of mouth-on behaviors. That can be interpreted as biting but sometimes it is just them wanting to play. However, because of the size of their teeth, it is super important to nip it in the bud right away. Putting your fist into the puppy's mouth when they go to bite will effectively stop the behavior or should - and you can reinforce by saying a command like 'no bite' to get the point across. You don't have to be overly loud about it or mean about it - just encourage the dog to NOT put their mouth on anyone for any reason. You can also replace with a chew toy and distract their attention to that behavior instead. It should be mentioned (not knowing how old your son is) that malamutes (or really any big dog) should never be alone with children because their behavior can be unpredictable. They do not understand children in general - their noises, quick movements, etc. It is through integration that they become GREAT family pets - but we have to be on top of them at all times so to speak. We have to train our big dogs to obey and be polite, be gentle. I use words like 'easy' or 'no bite' or even 'no paws' to train them to do what they should and should not do. I hope the above helps! Consistency is the name of the game with any dog and the more you work with them, the better they will always become.