The troubled production of Tom Horn
"The project took three years to go from concept to celluloid, had its budget slashed from $10 million to $3 million, went through four directors and two producers, and experienced the painful death of McQueen’s dog Junior, who was most likely gobbled up by wolves. To tell the story, McQueen alternated between two shooting scripts—a sweeping epic by Tom McGuane, which was twice the size of a normal screenplay, and a scaled-down version by Bud Shrake—to see his vision through."
More details and behind the scenes pics here:
https://truewestmagazine.com/troubled-tom-horn/
"According to [Exec Producer] Phil Parslow, Steve had problems articulating his vision. [Director Don] Siegel pulled Parslow aside one day and said, “I don’t know what this man wants to do. I come in every day, he rambles on and on. I just don’t understand him. I’m an old man, not in the greatest of health, and I don’t think I can help him. I don’t think we’ll be able to come to some conclusion of what he wants. One day it’s this, one day it’s that.”
More comments from people involved in the production here:
https://medium.com/@jeremylr/roping-the-legend-of-tom-horn-steve-mcqueen-s-overlooked-1980-western-fadd42991cf4