A feeder for pigs as they grow continually from weanling size to finisher pig size includes a trough and a shelf with a water pipe located underneath the shelf with a plurality of water dispensing nipples operable by the pigs to dispense water downwardly into the trough for mixing with feed in the trough. The shelf is fixed in height at a common height for use by the pigs both as weanling size and as they grow to finisher size so that it is not adjustable to accommodate growth. This is obtained by selecting the dimensions of the height of the shelf relative to the water nipples and the side walls and the shape of the shelf to allow the required access.