I need some help! (Season 1)

OK remember the episode on season 1 called the pack? You know when Xander was possessed by a hyena like spirit? Yea.
Do you know the song that played when he was with those "bullies"?
I remember they were outside coming up the stairs and they went over to some guys and ate their food. Well bit at it but didn't like it because it was raw.
(The song begins as soon as they start coming up up the stairs and everyone is staying clear of them)
Thanks in advance!