If you loved Day of the Animals, try The Manitou
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by William Girdler, and they both carry the 3am cult, dread mood tags, and they sit in Horror / Science Fiction territory. If that's the register that drew you to Day of the Animals, the second film will land in a comparable space — through a different lens.
3am cultdread
What The Manitou is
A Chicago tenement in January, radiators hissing like rattles. A lump on her back pulses beneath her coat, warm as a second heartbeat. Fetish charms clack in the dark, 1970s grind-house slasher gesture.

