Snape and Patronuses . . .err, Patronusi?

[Kamil]

No: HPFGUIDX 171067

<SnapesSlytherin>

Alternate 1. What are Snape's patronus and boggert?
 Patronus: I don't think he can...I don't think he
 has a happy enough memory to make a Patronus...

<Eddie>
 Maybe this is why he prefers a different way of
fighting off Dementors than Harry.

<houyhnhnm>
I don't think you need to have a *nice* happy memory
to conjure a Patronus.  When Harry produced one for
extra credit during his Transfiguration OWL practical,
he used the mental image of Umbridge getting sacked.
If all it takes is the thought of something bad
happening to someone you don't like, I would expect
Snape to be a Patronus champ.

<Kamil>
Isn't that the truth? But aside from all of that, wasn't Snape an
Order member, and therefore didn't he communicate with other Order
members via his Patronus? And if he couldn't do so, wouldn't we surely
have heard something about that by now? I am almost certain I remember
him coming on the Trio in trouble (or perhaps only Harry) at some
point and Harry registering that a silvery something shot out of his
wand towards the Castle.

I know Hagrid did so once or twice, but I am almost certain Snape did
as well. I'd check for myself, but I'm away from my books. Or, more
correctly, currently they're away from me. =D

Kamil