Morley is Trina Sinclair's bull dog.
Morley is first mentioned in Ginger Snaps where Brigitte decides with Ginger to kidnap him and to replace his absence with another dead dog's corpse to trick Trina into believing the Beast mauled him.
Morley is a large, built black bulldog that wears a collar with spikes on it. It has a deep, loud bark.
Morley's collar is seen in the bathtub scene when Ginger was shaving herself. This implies that Ginger dognapped Morley and killed him.