Island Of The Blue Dolphins(1964) -

The dog that played Rontu was the offspring of Spike, the dog from the classic film Old Yeller . Review of ISLAND OF THE BLUE DOLPHINS (1964) (Blu-ray)

Tragically, Ramo is soon killed by a pack of wild dogs, leaving Karana entirely alone. To survive, she must break tribal taboos by crafting her own weapons—skills traditionally reserved for men. Island of the Blue Dolphins(1964)

Karana initially seeks revenge against the wild dogs, but after wounding the pack leader, she takes pity on him and nurses him back to health. She names him Rontu, and he becomes her loyal companion. The dog that played Rontu was the offspring

The narrative is inspired by the true story of Juana Maria (the "Lone Woman of San Nicolas Island"), who lived alone on a Channel Island from 1835 to 1853. Karana initially seeks revenge against the wild dogs,

Over nearly two decades, Karana builds a home of whale bones, hunts for food, and develops a deep respect for the island's wildlife, eventually vowing to only hunt when absolutely necessary for survival.