Tormented Tarns slipping away

Somebody approached, and Kaertok's ears swiveled in their direction. A black wolf, male by the scent of him, was nearing, and Kaertok stiffened with apprehension about this stranger. He was a black wolf with hints of bright white about him, and Kaertok was uncertain what to make of this stranger approaching him so openly and without any hesitation. Had he never learned the importance of not trusting somebody he did not know?

Kaertok stood frozen in his tracks, tense but neutral, and awaited the other wolf's reaction.