Boymate(1)

In a distant trench-like cage lives a werewolf in quarantine, its fearful and dangerous.
People feed it by throwing stock from the above.

Whenever the anual full moon comes the werewolf goes in a rabid state to find a mate, people from the research department makes sure to finds him a mate since, an incident happened in the past that he's adrenaline rises up on mating season and has enable him to climb up the high walls.
He slayed a numerous number of people in a single night.