The old sanatorium from the movie was part of the sanatorium in Beelitz, near Berlin, Germany. The complex consists of 60 buildings built between 1898 and 1930. When the sanatorium was used as a military hospital in WWI, Adolf Hitler was among the wounded. After WWII, it was used as a military hospital by the Soviet Union until 1994. Since they passed on any modernization, the complex has been very popular among movie companies for history pieces. Parts of The Pianist (2002) and Valkyrie (2008) where shot in the area.
The scene with the animal-themed plates came from Anders Thomas Jensen's own at-home experience; His kids would bicker over the same silly problem during dinner.
The child's voice narration at the beginning and the end of the film was performed by the director's daughter, Karen Marie Jensen.
This film was accused of "bullying" people with a harelip, saying that "people with a harelip are compared to mildly mentally disturbed people and/ or animals." The director later stated that this film pays tribute to all kinds of people, and honors people being different from each other.
Mænd & høns is only the fourth feature-film by director Anders Thomas Jensen. Mads Mikkelsen, Nikolaj Lie Kaas and Ole Thestrup have appeared in all four.