Although I do own a MacBook Pro and an iPhone, I often wonder what causes our society to be so obsessed with Apple products. Generally laptops and phones from Apple will be just as good from other, more reasonably priced brands.
I see it could be two ways. One: the big dog is very kind and left the big bed for the pup. Two: the pup went on the big bed and left the small bed for the big dog. In that case, if I was the big dog, I would just lay on the small dog (or around it).