2007 [[SlidingScaleOfComedyAndHorror horror/comedy]] film directed by Jonathan King and produced by the UsefulNotes/NewZealand Film Commission.
Henry Oldfield and his brother Angus help their father raise sheep. A [[DeadlyPrank tasteless prank]] involving Henry being attacked by his older brother who's wearing the skin of Henry's beloved pet sheep Dudley followed by news of their father's death due to an accident results in Henry developing severe ovinophobia, fear of sheep, which causes him to leave New Zealand and not return until his brother asks to buy Henry's share of the farm as Angus plans to use modern bioengineering methods to create better sheep. As Henry is shown about the farm, members of an AnimalWrongsGroup, Grant and Experience, steal a sample from Angus's laboratory and accidentally release a bioengineered lamb who proceeds to infect the rest of the sheep to create hordes of bloodthirsty sheep.
Not to be confused with the [[Film/BlackSheep Chris Farley/David Spade film]].
!!This film provides examples of:
* AttackOfTheKillerWhatever: Killer sheep. Really.
* AnimalWrongsGroup: WEKA. Although it sounds like Grant is the reason things keep going wrong.
* BaaBomb: Near the end of the movie, the infected sheep have been safely corraled, but there's not enough medicine to cure them all. Multiple sheep farting makes Henry realize they have an alternative way of ridding themselves of the sheep...
* BestialityIsDepraved: Angus is revealed to have had carnal relations with the sheep on the farm. Bonus points for it being [[IncestIsRelative incestuous]].
* BlackSheep: At the beginning of the film, it's Angus, who apparently can't participate in the herding of the sheep due to a bad leg. Later, Henry's ovinophobia makes him the effective black sheep of the family due to being unable to help with the family business.
* GranolaGirl: Experience.
* MoodWhiplash: The DVD menu keeps switching between a footage of a sheep melancholically chewing its cud alternated with clips of rabid sheep attacking.
* NinjaPirateZombieRobot: Mutant Zombie Were-sheep
* OurZombiesAreDifferent: They're sheep! That turn humans into were-sheep!
* RaisingTheSteaks: The killer sheep are essentially zombie ([[OurZombiesAreDifferent Type P]]) sheep who can turn humans into [[OurWerewolvesAreDifferent were-sheep]].
* BlackComedyRape: While Henry is trying to cross the field of killer sheep disguised by a wool seat cover, one of the rams takes quite a bit of interest in his crawling form...
* SheepInWolfsClothing: Angus and [[spoiler:Henry]] find that their infection lets them walk among the killer sheep unharmed.
* ShoutOut: WETA did the special effects for the film. WEKA is the name of the AnimalWrongsGroup in the film. Even better is that both are named after actual New Zealand animals.
* SmokingHotSex: Angus locks himself, and the "prototype" of a new breed of sheep, in his study to protect them from man-eating sheep. When we next see him, he's smoking a cigarette in his underwear.