I should take a picture of this but I don't have one right now. My pup is 6 months old and she has two K9 teeth on both sides. The adult teeth are almost completely out and the puppy ones haven't fallen out.
But if they do not fall out soon you may have to get them pulled - I have had to do this a couple times. If they feel pretty loose wait a bit, if they are jammed in there tight talk to your vet. You don't wan't them to push the adult teeth out of line.