A two sided feeder for feeding animals as they grow from a first smaller size to a larger size includes a trough with a shelf mounted above the base of the trough with a feed hopper positioned for depositing feed onto the shelf and a water pipe formed from a rectangular tube and extending along the trough at a position underneath the shelf with a plurality of water nipples at spaced positions along the water pipe. A plurality of divider members are clamped on the pipe each between two of the water nipples such that the divider members together act to separate one side of the trough from the other side to prevent the passage therebetween of the animals when at the smaller size.