A feeding trough for poultry breeding, particularly for turkeys, comprising a top container (1), the bottom of which has a stationary part (11) formed with an array of passages (12) facing a bottom plate (2), and a mobile part (13) formed with an array of open/close elements (14) complementary to the passages (12). The mobile part (13) is able to rotate coaxially with respect to the fixed part (11) between a position of complete opening and a position of complete closing for controlling the flow of feed from the top container (1) to the top plate (2).