Abstract: A feeder is mounted on a gate portion of a nursery pen used for small pigs in a provided opening on horizontal pivot points to permit the feeder to be moved from a first feeding position wherein the pigs on the interior of the pen can feed, and upon release of a retainer flipped about its pivot axis into a substantially inverted position for cleaning. The pivoting is done on an axis that keeps the opening in the gate blocked during the time the unit is in its feeding position while it is being flipped to its inverted position, and also when it is being held in its cleaning position. The feeder has a feed supply hopper with a filling opening that is accessible from the exterior of the pen for easy loading.