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Explanation: Great importance is attached to the bristles of the boar. Perhaps they are the distinguishing characteristic of the animal or symbolize its strength. For example, Fion is killed by stepping on a boar's bristle after breaking a geasa against hunting boars (MacCulloch, 150). Some of the extraordinary boars, that King Arthur fights in Culhwch and Olwen, have bristles that are gold or silver. Conversley, when Menw tries to steal treasures from Twrch Trwyth, he is only able to take a bristle. The pig herders at the start of the Táin, Friuch and Rucht, are named after the bristle and the grunt of the boar, respectively. It is the bristle of the boar, Friuch, that proves to have the most power; in the end, Friuch reborn as Donn Cuilnge destroys Rucht as Finnebach Ai. The bristles of the boar are mentioned many other times implying that they are an important part of the animal.
The two pig keepers, Friuch and Rucht, assumed the shapes of many creatures to try to gain an advantage over one another after their rivalry escalated into a long fight (Kinsella, 46-50).