Here's where I am.... 12 years ago when I first got a dog, being the "pack leader" was in all the books and anyone you ever spoke to.
I have subsequently learned that this is now dismissed, which is great - my dog always slept on my bed anyway and behaved no differently, so makes a whole lot of sense to me. Looking back, I realise he was essentially my boy and I gave him some boundaries.
What I am unsure of is the accepted view of how dogs are with each other. What is it that they do? Do they still have "pack" culture and if not what is it? Do they just get on with some and not others, like humans do?? Are two dogs of the same age and gender always going to have one looking to be higher in status?? Or something completely different? (not in a Monty Python way 
)
Thanks!