Un día de furia animal

This film is sometimes mistakenly called a sequel to director William Girdler's previous film Grizzly, garras de la muerte (1976), mostly because it basically had the same plot and trained bear, had the same executive producer/distributor (Edward L. Montoro), director (William Girdler (as mentioned above)) and production company/distribution company (Film Ventures International (FVI)), and featured both Richard Jaeckel and Christopher George, who had also previously appeared in Grizzly. There was also a true sequel to Grizzly titled Grizzly II: The Predator (2020) (working title: "Grizzly II: The Predator"), but originally it was never entirely completed and thus was never released in theaters or on home video until January 8, 2021. Before this happened, however, an original work print of the sequel had illegally surfaced on the Internet in 2007.

When the hikers are running to an abandoned cabin while a pack of German Shepherd Dogs is chasing them, there appears to be a crew member sitting on a hill in one shot.

Featured in Dusk to Dawn Drive-In Trash-o-Rama Show Vol. 1 (1996)