The best thing to do when you get a new pup(or even a grown dog) is to take them to your vet for a check up. If you have a shot record for her-bring it with you. She could have allergies, is her runny nose clear, or white or green? Sometimes the stress of a new situation can affect them. She needs to be checked for worms, and for anyone to help you with suggestions, they would need a little more info about your dog.