Is this the thing where OZFM (orKrock) punk'd the NFLD PETA?
The breakdown:
Stephen Harper (Prime Minister of Canada) is in St. John's to address ... something to do with the construction industry.
A single person representing PETA flies across the continent from Vancouver, intending to protest the seal hunt at the event.
Local radio station K-Rock catches wind and contacts the protester, offering to help her protest.
Protest begins, and shortly a K-Rock employee shows up dressed in a giant seal costume helping the girl protest.
Shortly into the protest, the costumed K-Rock employee tears off the head of his costume and begins to denounce PETA.
Another local man, also in costume (this one a Newfoundland Dog) arrives on the scene, misunderstands what is happening, and pies the seal-costume wearing man. This is ironic, since the guy in the seal costume was in the middle of denouncing PETA.
K-Rock employee departs, and somehow the lone protester gets ahold of the seal costume, dons it, and continues to protest.
Later, the Newfoundland Dog costumed man returns with another pie, apparently realizing his earlier mistake. He gets it right and pies the PETA protester, who is now wearing the seal costume. In order to do this, he has to rip the head off the costume.
The Newfoundland Dog costumed man disappears into the night. Eventually Police arrive and advise the PETA girl that she is putting herself in extreme danger by continuing to protest.
I'm not sure what happens after that, but I think it's pretty much the end of the story anyhow.
Here's an article on CBC.ca.
EDIT: After reading the article, it turns out I got the story wrong. There was only one pie, and it didn't hit the K-Rock employee. The K-Rock employee denounced PETA, and departed, and then as the protester was putting the costume on, the Newfoundland Dog pied her and took off into the night (and by night, we mean mid-afternoon).