In addition to the changes for the lycanthrope template, make the following adjustments to the base creature.
Challenge Rating: Normal werewolf’s CR +1.
A bestial werewolf does not gain a hybrid form, and its animal form is that of a dire wolf, rather than an ordinary wolf. Otherwise, this ability functions identically to the change shape ability granted by the lycanthrope template.
While in animal form, the first time each round that a creature damages a bestial werewolf, the bestial werewolf can take an attack of opportunity against the creature. The werewolf must threaten the triggering creature to use this ability.
Pathfinder Roleplaying Game Horror Adventures © 2016, Paizo Inc.; Authors: John Bennett, Clinton J. Boomer, Logan Bonner, Robert Brookes, Jason Bulmahn, Ross Byers, Jim Groves, Steven Helt, Thurston Hillman, Eric Hindley, Brandon Hodge, Mikko Kallio, Jason Nelson, Tom Phillips, Stephen Radney-MacFarland, Alistair Rigg, Alex Riggs, David N. Ross, F. Wesley Schneider, David Schwartz, Mark Seifter, and Linda Zayas-Palmer.