From Team Fortress Wiki
This item can only be worn around Halloween or during a Full Moon; at other times of the year, it does not appear in gameplay, unless the server has Halloween mode enabled. However, it can be equipped at any time and can still be viewed on the loadout screen even when it is not visible during games.
|The Highland Hound|
Allows the Demoman to perform the Wolf Howl taunt
- The Scottish Snarl was added to the game.