It's a real film, and one that I might tack onto my Netflix queue. (I just hope I don't somehow get the other Black Sheep instead.) I could swear KrisDina and I had a conversation about this very possibility — or, more realistically, inevitability — while driving through a road-blocking flock while in New Zealand, but that could just be my imagination.
Read the back! The back!
For the record: another time sheep were disturbing.