Food mysteriously bubbles up from the ground on a remote island somewhere in British Columbia. Mr. and Mrs. Skinner consider it a gift from God, and feed it to their chickens, which grow larger than humans as a result. Rats, wasps, and grubs also consume the substance, and the island becomes infested with giant vermin. This film is loosely based on a portion of the H. G. Wells novel The Food of the Gods and How It Came to Earth.

References:
https://en.wikipedia.org/wiki/The_Food_of_the_Gods_(film)