Introducing an older dog to a new puppy?

Whatever you decide to get..make certain you introduce them on common ground....when you get home with the puppy...bring Molly outside...allow them to sniff, play and get to know eachother outside first (in a controlled environment of course)....then after 30 min. or so, bring them both in the house together. This will show Molly that it's not HER territory. I have a pug that does the bite the back legs play with my 11 year old beagle. The pug is trying to play, but the sharp little teeth hurt the older dog. Don't allow the puppy to do this. Also, make sure Molly has a space of her own that the puppy is not allowed to go into. They will eventually get used to eachother... in the meantime..do not leave them alone together unattended.