The invention is a dispensing module for use in delivering measured doses of feed supplement to an animal. It comprises a storage container for holding the supplement and a metering module that is rotatably connected to the storage container for dispensing a measured (pre-determined) dose of the supplement. The dispensing module is adapted to be moved between an open configuration and a closed configuration. In the open configuration, the measured dose of the supplement is able to be dispensed out of the dispensing module. In the closed configuration, the measured dose of the supplement is prevented from being dispensed out of the dispensing module. Compressed air can be used to send the dose to an outlet when the dispensing module is closed.