A feed supplement delivering apparatus for repeated delivering of measured doses of feed supplement to a feed trough for an animal, the apparatus comprising: a storage container adapted to store the feed supplement in bulk, a loading conduit extending between the storage container and a breech region, the loading conduit adapted to serve as a means via which a measured dose of the supplement is able to transfer from the storage container to the breech region, a delivery conduit connected to or integrally formed with the loading conduit, the delivery conduit extending between the breech region and a dispensing outlet, the delivery conduit adapted to guide the supplement from the breech region to the dispensing outlet and via which the measured dose of feed supplement is able to pass into the feed trough, an air delivery means for delivering a charge of air into the breech region in order to transfer supplement in the breech region to and out of the dispensing outlet, and a metering module that is connected to the storage container to dispense the measured dose of the feed supplement from the storage container to the loading conduit in order to be subsequently delivered to the breech region via the loading conduit, characterized in that the apparatus further comprises: at least one valve that is located in the loading conduit between the metering module and the breech region, the at least one valve being adapted to selectively seal and unseal a portion of the loading conduit, wherein the air delivery means is adapted to deliver the charge of air into the loading conduit between the at least one valve and the breech region so that when the portion of the loading conduit is sealed by the at least one valve, the at least one valve is configured to prevent the charge of air delivered from the air delivery means from flowing to the storage container or the metering module, and wherein the air delivery means is located between the at least one valve and the breech region. a storage container adapted to store the feed supplement in bulk, a loading conduit extending between the storage container and a breech region, the loading conduit adapted to serve as a means via which a measured dose of the supplement is able to transfer from the storage container to the breech region, a delivery conduit connected to or integrally formed with the loading conduit, the delivery conduit extending between the breech region and a dispensing outlet, the delivery conduit adapted to guide the supplement from the breech region to the dispensing outlet and via which the measured dose of feed supplement is able to pass into the feed trough, an air delivery means for delivering a charge of air into the breech region in order to transfer supplement in the breech region to and out of the dispensing outlet, and a metering module that is connected to the storage container to dispense the measured dose of the feed supplement from the storage container to the loading conduit in order to be subsequently delivered to the breech region via the loading conduit, characterized in that the apparatus further comprises: at least one valve that is located in the loading conduit between the metering module and the breech region, the at least one valve being adapted to selectively seal and unseal a portion of the loading conduit, wherein the air delivery means is adapted to deliver the charge of air into the loading conduit between the at least one valve and the breech region so that when the portion of the loading conduit is sealed by the at least one valve, the at least one valve is configured to prevent the charge of air delivered from the air delivery means from flowing to the storage container or the metering module, and wherein the air delivery means is located between the at least one valve and the breech region. at least one valve that is located in the loading conduit between the metering module and the breech region, the at least one valve being adapted to selectively seal and unseal a portion of the loading conduit, wherein the air delivery means is adapted to deliver the charge of air into the loading conduit between the at least one valve and the breech region so that when the portion of the loading conduit is sealed by the at least one valve, the at least one valve is configured to prevent the charge of air delivered from the air delivery means from flowing to the storage container or the metering module, and wherein the air delivery means is located between the at least one valve and the breech region.