From Creatures Wikia
The Civet Norns are an official Norn breed that is included with Creatures 3. They are easily identified by their white fur with black spots, similar to that seen on Holstein/Fresian dairy cows. They occupy the Norn-C breed slot.
Civet Norns share their name with a terran species, the Civet, some breeds of which are also known for their spotted black-on-white fur.