Depends on the temperments of your dogs. If they're great, sweet dogs, then just let them sniff each other and if the older dog has had enough of the puppy, take the puppy away for a while and re-introduce him later. Only one rule, NEVER leave them alone together. And don't let them sleep together on their own, the bigger dog could accidentally suffocate the puppy by rolling on him. Once both dogs are very comfortable with each other (maybe 2 months from now) then they should be fine by themselves together. Hope that helps!