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Along the way, the story was greatly modified to make it more suitable as a family film. By the time it was completed in 1981, the film had changed into a chronicle of the unlikely friendship of two creatures, who should be natural enemies and who learn society sometimes tries to determine their roles despite their better impulses.[21] In the original screenplay, Chief was slated to die the same as in the novel, but Stevens did not want to have an on-screen death and modified the film so that he survived.[20]

The film premiered theatrically in the United States on July 10, 1981.[20] It was an immediate success, grossing $39,900,000 to become the 14th top film of the year.[18][22][23] It was subsequently re-released theatrically on March 25, 1988,[23] and saw its first home video release on March 1, 1994.[24]
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