It's a breed that has a dab of cheviot, an ancient Scottish breed suited to rough, wet conditions.
From the themercury.com.au
Tweed is a made-up, rough, unfinished woolenfabric, of a soft, open, flexible texture, resembling cheviot or homespun, but more closely woven.
From the en.wikipedia.org
Cheviot Climate Assets, a relatively new environmental fund, has 13.4% of its fund in food, specialising in grain production and harvesting, food testing and food processing.