From The Grey House:
Rebecca gave the signal and the three werewolves advanced. With them were three vampires: Vincent, Joseph, who was standing by his master, and Mierka, who was somewhere in the woods, finding an alternate way into the house. As the werewolves advanced up the long driveway, they changed into wolf form and merged with the woods. They were quieter as wolves, and less conspicuous. Vincent and Joseph, after checking to make sure that the wolves were doing well, ran up the drive. The werewolves were there for stealth; the vampires were for speed and strength.
Cat Stark 