Post by chimaeraCouldn't a werewolf (tranformed) be stopped by a Stupefy, Petritificus
Totalis, or similar spell? Is this mentioned in the books? Are
werewolves resistant to spells, like giants (too many of these
loopholes, in my opinion)?
It was never mentioned, one way or the other. But I think the evidence
suggests that possibility. When Lupin transforms and endangers the
kids, Black doesn't attempt to use a simple spell to stun or petrify
him. Instead, he changes into a dog and fights him. Granted, this
could be a desire not to harm his friend - but Hermione petrified her
friend Neville, without any serious consequences. It would seem that a
dog fight would be far more hazardous.
Also, Dumbledore and Snape both seem to believe that Lupin (as the
werewolf) would have killed Snape. If it were easy to magically
dispense of a werewolf, the danger would be minimal. (Of course,
there's the surprise element to consider. Coming out of a narrow
tunnel, one might not be prepared to deal quickly enough with a
surprise werewolf attack.)
Then there is the general fear of werewolves in the wizarding
community (which forced Lupin to leave the school). Granted, some of
this could be merely bigotry against anyone different. But the way
characters talk about werewolves seems to indicate that they genuinely
fear them. If it were simple to subdue one with a wand, the fear
shouldn't be that acute.
On the other hand, Lockhart claims to have zapped a werewolf in a
phone booth - but Lockhart isn't a particularly reliable source... He
also claims to have "performed the immensely complex Homorphus Charm"
and changed a werewolf back into a human. Again, though, it was
probably bragging on Lockhart's part.
Later, Lockhart, defending his lies, says "some ugly old Armenian
warlock, even if he did save a village from werewolves." Which
indicates that there WAS someone how saved people from werewolves. But
we're not told how he did it.
Snape assigns the kids " an essay on the ways you recognize and kill
werewolves." That tells us that it is possible to kill them (old
legends are a silver bullet and/or wolfbane), but still doesn't
mention any magical defense against them.