King, the border collie who plays Lance, was a Western champion sheepdog.
The $1,600,000 ($13,350,000 in 2016) budget of the film was financed by producer Samuel Goldwyn Jr. through a personal loan of $1,200,000 from the Bank of America, co-signed by his father, Samuel Goldwyn, and the rest from himself.
According to Olivia De Havilland, Alan Ladd was a bit afraid to star in this movie because of Michael Curtiz's reputation to be harsh with actors.
Adolphe Menjou was originally cast in the film but was replaced when he tore ligaments in his leg and groin.
Production was halted temporarily when director Michael Curtiz had an emergency appendectomy.