Actually, no. A dog is a dog. Wait and see the dog's breed, temperament and personality and go from there. You might start out with Dogs for Dummies and some breed specific publications you pick up at Petsmart, visit some websites, and you are all set. If your rescue is shy or timid, give her a few weeks too. She may blossom. Ditto for housebreaking problems. It usually takes a week for a dog from a shelter to get housebreaking back down.