Not that anyone specifically asked but, in case anyone was wondering what the three main stages of werewolf transformation in 'The Pack' were inspired by, here are my main influences.
You'll note that "giant, fluffy, adorable wolfie from 'Twilight'" is nowhere to be found:
Half-Transformation: think Jack Nicholson in 1994's 'Wolf'
Wolf-Man: the final stage for most werewolves in my interpretation would closely resemble Benicio del Toro in the 2010 remake of 'The Wolfman'
Alpha Wolf: the rare beast's look was inspired by the fully transformed creatures in 1981's 'The Howling'
Hmmm, in hindsight I should probably give legendary special effect guru Rick Baker a shout-out.