The film was shot on sets left over from Against All Flags (1952).
The rest of his films, were either shot on preexisting sets or with even more minimal budgets.
Filming was done entirely outdoors, including interior scenes which were shot on sets built outside and topped with cotton screens to control the sunlight.
Scenes with the cats were shot on secure sets in steel-encased rooms.
The film was shot on leftover sets for the westerns that were normally made at Republic Studios.
The film was shot on indoor sets in black and white and Megascope.
It was shot entirely on indoor sets.
It's impossible to tell which material was shot on sets and which on actual locations.
The film was mostly shot on sets because it was winter in Vancouver.
Unusually for a low budget independent film, all scenes were shot on specially constructed sets.