What does Buck find when he returns to camp after killing the moose Why do the Yeehats consider Buck an Evil Spirit?

When Buck returns to camp after killing the moose, he finds his companions slaughtered by the Yeehats, who have attacked the camp in his absence. The Yeehats consider Buck an Evil Spirit because of his impressive strength, intelligence, and the fear he instills in them as a formidable creature that defies their understanding of nature. His survival and dominance over the wild further cement this perception, as they believe he possesses supernatural powers.