What's a breeding hut?
Sorry I am very late, as an zoologist, I can tell the basic info about this.
When a species is endangered and requires a lot of importance, for eg. take Hawaiian Crow (Corvus hawaiiensis)
or Indian White-Rumped Vulture (Gyps bengalensis), what we do is take males and females to breed in an enclosure.
Some animals show signs of pheromones when they are ready to mate, so zoo workers move them to a separate chamber to mate.