Glad to see you go a new puppy.
I have a very large siberian husky that people keep asking in person if hes a malamute (falls into the breed standard by weight, size and build), and a mix breed puppy that is siberian husky(has the merle gene for the blue eyes, and some other features), possibly white shepard(has the shape and long legs, long ears), and malmaute (has the facial pattern, the voice of the mal), hes only 10.5 months old and 77 lbs.
If you teach both that you are in charge of the food, and that you control it, you can feed both together, but you must be right there, you must be ready to jump in and show them both that you control who eats what and how much. They will enjoy it more if you set boundaries such as that. I fed my 2 separate for a while, then as the puppy got closer in size to the sibe I started to feed both together, they are a pack, they eat together, they go to the potty together, they walk together, hike, etc.
They are born knowing what their position will be (at least among dogs) and it will come out (or start to show) at about 1-2 years old. Some show earlier in life and some come out of their shell a bit later. Some will accept a lower ranking position until either weakness allows for them to move up, or a death, etc.
Hope to see you dogs pictured soon.