I changed this section, Tyciol; I'm just at a different location.  I removed the part about scaring the wolves away; Sesshomaru got there long after the wolves had gone; he didn't even know that it was Koga's Wolf Demon Tribe that mauled Rin.  He didn't know it when he met Koga, and Rin has never told him; when she saw Koga again, and I'm not recalling the precise episode now, she was so frightened by the mere sight of him that she nearly lapsed into her terror silence again.  So far as the anime has established, Sesshomaru knows nothing beyond the fact that Rin was mauled to death by wolves in the forest.  His rage towards Koga if he knew is a plot device from the fandom.  69.166.48.213