Did Peter used Harry's wand to transform into a rat in the book? WAS: Movie

[justcarol67]

No: HPFGUIDX 168140

Liz wrote:
> 
> In the book, didn't Petter steal Harry's wand to turn back into a
rat? If not, then sorry, I'm mistaken. But I was just thinking that
even though he was tied up, he could have turned into a rat at anytime
to  get away. So if that's true, then maybe if you force someone to
come  out, then they need a wand to turn back. Again, if I'm wrong,
sorry. 

James replied:
  
> That seems like a plausible explanation. The spell cast against
peter was some kind of Animagus ability blocker. He used the wand to
remove it, not to transform. He was just able to transform naturally
afterwards.

Carol responds to both:

Maybe it's time to look at the canon itself. The spell cast on
Pettigrew turns him aback into a man (see my posts arguing that this
is the Homorphus Charm), but nothing is said about the spell blocking
Wormtail's ability to turn back into a rat. In fact, Black
specifically threatens him, saying, "But if you transform, Peter, we
*will* kill you" (PoA Am. ed. 376). Lupin later reinforces this threat
with, "One wrong move, Peter" (380). They have wands; he doesn't.
They've already shown that they're willing to kill him. So Peter has
no choice but to go along with them while they're in human form.

But when Lupin transforms into a werewolf, he wrenches free of the
manacle attaching him to Wormtail, who is now half-free. Black
transforms into a dog to protect the kids from the werewolf, and
Pettigrew seizes the opportunity to grab Lupin's wand, not to
transform himself into a rat, but to attack the others, starting with
Ron (to whom he's still shackled) and Crookshanks (who'll chase after
him--and no doubt eat him--if he transforms):

"Pettigrew had dived for Lupin's dropped wand. Ron, unsteady on his
bandaged leg, fell. There was a bang--a burst of light--and Ron lay
motionless on the ground. Another bang--Crookshanks flew into the air
and back to the earth in a heap" (381).

Harry shouts "Expelliarmus!" and disarms him but Wormtail transforms
and escapes. He acquires Voldemort's wand at some point between this
scene and the murder of Bertha Jorkins, but he is still wandless at
this point.

Carol, noting that transformation into an Animagus form, like Tonks's
Metamorphmagus abilities, is wandless magic