Dogs do have a way on how they communicate their own "pecking order".  I feel with close supervision it is sometimes best to stand back and allow them to "doggie communicate" ... But I do stress the "close supervision"...   
I have a HUGE dog, Daisy.  Here are two pics.  (older Yorkie Talk members I am sure have seen these pics before)        
				__________________  ~~**~~ Schatzie and Ransom  ~~**~~     |