Hey Samba! I would have to say too that you might think about just letting them do their thing. The puppy might snarl and even nip but your other pup will let Cedar know where his/her place is.
My 2 1/2 year old aussie had a problem with a puppy who didn't want to be messed with and tried to get Maiven to fight--Maiven tangled with her but just long enough to establish rank. They were playing with each other soon after that.