Abstract: An efficient and highly productive method for rearing pigs wherein successive litters of pigs are placed in an enclosed building within a series of cages following weaning, the cages having floors of openwork construction to allow animal waste to pass therethrough and to keep the pigs in a dry condition. The animal waste passing through the floors of the cages is collected in an underlying trough where it is readily accessible for periodic inspection to locate any unhealthy pigs and thereby facilitate segregating them from the healthy pigs. Several times a day a sweeping flow of water is directed along the trough to flush away the animal waste from below the cage.The cages are arranged in the building end-to-end in vertically aligned tiered relation to form respective upper and lower elongate series of cages, with each cage comprising a floor of openwork construction and an open-bottomed enclosure also of openwork construction restingly positioned on and supported by the floor.