Dosing heads for apparatus for dispensing a defined amount of dry powder concurrently to a plurality of spaced apart dose receiving containers include a plurality of spaced apart elongate channels having a channel length with an upper end defining an entry orifice and a lower end defining an exit port. In use, the dosing heads are aligned with a dry powder bed residing above and in communication with the dosing head and at least one vibration source in communication with the dosing head channels configured to controllably apply a vibration flow signal. When the vibration flow signal is applied to the dosing head channels, dry powder from the dry powder bed flows through the elongate channels and out the exit port and when the flow signal is removed, dry powder does not flow through the dosing head elongate channels.