The acting is great in this psychological thriller with Oliver Reed, Samantha Eggar and Art Hindle giving powerful performances. The weakest link is the little girl, Cindy, played by Candice Carveth. They really needed someone like Carol Ann from Poltergeist in this role. Candice simply doesn't deliver the sense of terror required by the role.
As far as plot goes, the basic story involves the relationship between an unconventional but gifted psychologist [Reed] and his patient [Eggar]. Beyond that, it simply journeys through the weird and unexplained.
So, I give this one a Very Good rating for the quality of the film but it's simply not my cup of tea. If you like really strange avant-garde films, then you will probably enjoy The Breed.
RATING: Very Good.
For more info check out the film's entry in IMDB.