 The attack dogs outside of the vampire mansion were actually very  docile and playful canines, which were the only dogs available at  the time. For the scene where they chase Scott Speedman (qv),  director Len Wiseman (qv) had to film short clips of the dogs  running and later put in sounds of vicious barking. If you look  closely though you can see their tails happily wagging back and  forth.