Abstract: A liquid feeding nipple is disclosed for feeding liquids to fowl having a hollow housing, a valve seat insert located in the housing, the valve seat insert having a first liquid passage, a housing cap on a second end of the housing, the housing cap having a second liquid passage, and a valve member movably located within the housing so as to be movable between a closed position, in which liquid communication between the first and second liquid passages is prevented, and an open position which enables liquid communication between the first and second liquid passages. The liquid feeding nipple also has a trigger pin with a head in contact with the valve member and a stem extending from the housing. The stem has a first flow control portion adjacent to the head and a second flow control portion adjacent to the first flow control portion such that the cross-sectional area of the second flow control portion is less than that of the first flow control portion.