I get asked occasionally for help with werewolves so I knocked up this little help sheet. I know it's pretty basic, but it has all the foundations I use to build my werewlves on. As you can see from the sample artworks I let them evolve and turn out however feels right as I'm drawing them, but the basic structure remains unchanged pretty much. It's basically a blend of human and dog/wolf physiology (as you'd expect). I don't know really how useful this will be, it's aimed at people who haven't drawn a lot and studied anatomy etc.
You can also find hair and airbrushing and blending tutorials in my gallery tutorial section which go into more depth on adding finishing details and textures.
Good luck werewolf fans!