When Karana finally catches up to Rontu, what has transpired between him and the wild pack of dogs?

Rontu has been in a fight with two of the wild dogs. During the fight, Rontu led them toward the cliff, where he stealthily killed them both. Rontu never left Karana again, and they were no longer bothered by the wild dogs.

In a short time Rontu rose to his feet and left the spotted dog where it lay. He walked to the top of the mound and lifted his head and gave a long howl. I had never heard this sound before. It was the sound of many things that I did not understand.
He trotted past me and up the ravine. When I got to the house he was there waiting, as if he had not been away or nothing had happened.
In all the lime he lived, Rontu never left again. and the wild dogs, which for some reason divided into two packs, after that never returned to the head- land.