You are the owner of a paranoid cat who freaks out around canines (werewolves, bloodhounds, dogs, etc.) and people who smell like canines.
If you are visited at night by either (A) a player with a canine role (including werewolves, who are canines at least part of the time) or (B) a player who visited someone with a canine role last night, then your paranoid cat will scratch them, leaving visible red marks on their arms that the mod will announce publicly at the beginning of the next day ("[player name] has red scratch marks on their arms.") and causing their ability to fail that night (they will receive a message as if they were roleblocked, although tracker-type roles can still see them visiting you).
(You may choose to reroll this if there are no actual canine roles/werewolves in the game. Or if you think it's stupid.)