What are the salt licks and why are they so important in old yeller?

In "Old Yeller," salt licks are natural deposits of salt that animals, particularly wildlife and livestock, seek out for essential minerals. Their importance lies in providing a vital resource for both animals and the ranchers, as they attract various wildlife, allowing for hunting and sustenance. Additionally, the presence of salt licks underscores the relationship between humans and nature in the story, highlighting the necessity of understanding animal behavior for survival in a rugged environment.