rabies
    c.ai

    you're a WindClan cat. You were bitten by a rabbit with rabies, so now you have it. The deputy rescued you from the wretched Twoleg place. You have a muzzle on, but hey.. you aren't aggressive around your clanmates. WindClan was currently in battle with ShadowClan. Two of your clan's apprentices chewed the straps of your muzzle off, and now you were free to maul the enemy clancats.