A Cry in the Wilderness (1974)

The father of a wilderness family gets bitten by a skunk, and fearing rabies, chains himself to a barn to protect his family should he go mad. He orders his son not to come near him no matter how persuasive or rational his appearance or argument. However, the creek dries up, indicating an upstream blockage and an imminent flood. Several trips upstream by the son have failed to locate the blockage and now Dad wants to be released...