Cougar

Cougar (1984) is a family, adventure directed by Stephen H. Foreman rated 7.0/10.

A flash flood sweeps a boy and his sister onto an island in the Mississippi River, where they are trapped with a cougar and her new born cubs. In an effort to escape the island, they find themselves threatened by two ruthless river-men who will stop at nothing to kidnap and hold the children for ransom.