Just throwing out possibilities rather whimsically, lol. Perhaps the problem is you're too focused on trying to find a certain 'type' of title, ie a dark gothic, and so you're cutting yourself off from a lot of avenues that might end up surprising you with a good match?
TOOTH AND NAIL (or is it claw?)
HUNGRY LIKE THE WOLF (ok ok, so a Duran Duran title isn't what you're looking for, but who could resist!?)
HUNGERS OF THE FLESH (Hmm, sounds like zombie porn, so maybe not)
DARK SIDE OF THE MOON (Ok, we've progressed to a Pink Floyd song, so a slight improvement in the theme/tone match)
A LUNACY OF LYCANS (apparently I am channeling George R. R. Martin here...)
MIDNIGHT HOWLS (hmm something with midnight might actually have potential...)
HOWLS AT MIDNIGHT (never mind, I'm just stuck on howl now)
RUNNING FROM THE PACK (aaaaaaand we're back to song references and have 'The Leader of the Pack' stuck in our heads - and we're also talking in the third person and not sure when or why that happened....)
SOMETHING LIKE MADNESS (and not sure where in the hell that came from or what it has to do with the price of tea in china or what the hell the price of tea in china has to do with anything either, so that might me a sign I'm being useless here and its time to bow out. Au revoir, all.)