if she hurts him he will welp. she will be playing with him, and teaching him the boundaries in the house. exactly what he can and cant get away with.
i have a ridgeback (candy) and just rought home my 8 week old rottweiler (kisskI). candy is doing the same things to kisski. its a learning curve for your puppy. try to let them be, but if he does welp, then just tell her ti calm.