You should have seen it when I had my two Malamutes! Simon was alpha (in his mind only) and weighed 120 lbs. He got the head of the bed and Makaella the foot - which she resented completely - but they worked it out. If I didn't race to the bed first I probably wouldn't have a place at all as Simon would lay sidewase and by the time we were all situated, I had about ten inches on my side and they had the rest, of a queen bed.
(And yes, that sounds like an owner out of control, letting her Mal's run the house but really it was the only thing I gave in on - really (!). Some things are just easier to give in to than wrestling 120 lbs to the floor!) LOL