, he is the guardian if a stranger comes in the house (he barks with intimidation).
it sounds like he is fearful and your son smelled and looked different and that set him off
just because he 'barks with intimidation' does not mean he is a guardian
at 10 mos old he should take your cues who to 'allow' and whom not to allow!
i would never let a 10 mo old decide for himself that he has to bark at people coming to my house
we will see what others have to say but it sounds like your pup is fearful and this is an extention of that fear
lol michael e no he is not challenging the kid for position
that said i would not allow this dog on the bed at all
he needs to be reminded he is a dog and that you, not him, are a pack leader