Who tells Travis the story about an uncle who chained himself to a tree after being bit by a dog with hydrophobia in old yeller?

In "Old Yeller," the story about the uncle who chained himself to a tree after being bitten by a rabid dog is told to Travis by his father, Jim Coates. This story serves to illustrate the severity and dangers of rabies, highlighting the tragic consequences of the disease. It emphasizes the fear and seriousness surrounding rabies during that time, which becomes relevant to the challenges Travis faces with Old Yeller.