In its most uncontrolled state a werewolf will attack anything, even trees that seem the least bit 'suspicious'. A werewolf used all of its senses at hyper-awareness so just about anything will set...
I can give you a site that has instructiions to be a therian. They are sort of like weres but are four leged and anyone (well almost anyone) can be one. Check out the related link.
Nobody has ever proved that they existed but to become one you have to be either scratched/cut or bitten by one. Although most werewolves are just a main part in some fiction/science fiction/fantasy...