Werewolves of London, maybe.

"Of Wolf and Man" by Metallica comes to mind. http://www.sing365.com/music/Lyric.nsf/Of-Wolf-And-Man-lyrics-Metallica/F43B014C0118A7B54825688D003432F1 Also "Night Wolf" by Krokus. http://www.sing365.com/music/lyric.nsf/Night-Wolf-lyrics-Krokus/962512E8AC6BB122482571000027F1F7 Not exactly about wolves or werewolves per se, but there's a central theme there.

A Dream of Wolves in the Snow - Cradle of Filth. It's one of their first songs and rathers short, but still awesome ^^

Dio - Lock Up The Wolves

Hmmmm...nothing metal specifically, but this one was considered 'rock': Werewolf, by Five Man Electrical Band: Mama said, there's Something weird 'bout Billy I looked in his room, his bed Wasn't slept in at all last night But Papa said, ah, now Mama Don't you go talking silly He's just a young boy He's just sowing his wild oats And that`s all right But Mama said, no There's something real Strange bout my Billy The farmer down the road said he Lost a few of his sheep last night I know he's my own flesh and blood But he makes my blood run chilly Cause I saw him from my window And he was on the heel Just screaming at the moonlight Is it any wonder we hate To see the sun go down And is it any wonder we hate to See the full moon coming around So Papa said, I guess there's Only one thing to do bout Billy Hand me down my gun, son Bring along that silver dinner bell But Mama said, Papa I beg you, don't kill him Cause I just couldn`t bear to Think about my baby in Hell But he went down to the blacksmith Got him out of bed and said Get your fire hot Oh, shut up your shutters And close down the doors We're gonna need all the heat you got Cause I want you to melt my Silver bell down to a single shot I got a job to do and I got to get it Done before the sun comes up Oh, so is it any wonder that we Hate to see the sun go down Then we heard a shot And I said, Papa got em Then we heard a scream and Mama Smiled and said, betcha Billy got em But when I lifted up my eyes, there was Papa in the doorway staring at the floor And my big brother Billy never did Come home no more Is it any wonder we hate To see the sun go down And is it any wonder we hate to See the full moon coming around . .

Ozzy's "Bark at the Moon" comes to mind