The depletion of the earth's ozone layer causes animals above the altitude of 5000 feet to run amok, which is very unfortunate for a group of hikers who get dropped off up there by helicopter just before the quarantine is announced.

Day of the Animals (1977) streaming availability varies by region. Check Netflix, Prime Video, Disney+, and other major platforms. It may also be available for digital rental or purchase on Amazon, Apple TV, or Vudu.
The depletion of the earth's ozone layer causes animals above the altitude of 5000 feet to run amok, which is very unfortunate for a group of hikers who get dropped off up there by helicopter just before the quarantine is announced.
Day of the Animals (1977) was directed by William Girdler. The film is a Science Fiction, Horror production with a runtime of 1h 37m, rated 5.2/10.
Day of the Animals runs 1h 37m (97 minutes total). Audience rating: 5.2/10 from 75 votes. Genre: Science Fiction, Horror.
Day of the Animals is rated 5.2/10 by 75 viewers — below average. A good pick for Science Fiction and Horror fans.