Welcome to the world of saving the world! Even though your vet may not be concerned, it wouldn't hurt you to get the gal on something asap. Even though all yours have been vaccinated (VERY Good!), there are viruses out there that are not covered by the distemper vaccine and always new strains. Can't hurt to get her started... Is she sneezing yellow? Well, doesn't matter, she is new to you and should be treated radically since you don't know her, don't you think? I mean, an antibiotic to prevent bacterial infection, go ahead and treat for worms, and vaccinate for rabies and when out of the woods with her uri, a distemper vaccine! Check for fleas yet! Ick.