PoA Question -- Sirius & Dementors

[plinsenmayer]

Original Yahoo! HPFG Header:
No: HPFGUIDX C5674
From: plinsenmayer
Subject: PoA Question -- Sirius & Dementors
Date: 8/3/00 9:42 pm  (ET)

Hi:

I was chatting with a friend today - I gave her the HP books as a birthday
gift. She raised an interesting question from PoA, so I thought I'd
throw it out.

When Sirius is cornered by the Dementors near the lake and Harry &
Hermione rush to help him, why is he in his human form at this point? He
was a dog, chasing after Pettigrew. Harry & Hermione then heard him
yelping, in pain (as a dog). Then, the next thing we know he's cowering
in front of the Dementors in his human form. Did the stress of running
into the Dementors somehow cause him to transform back into his human
form? He was clearly less vulnerable (by far) to the Dementors as a dog.

Thoughts??

Penny