Abstract: A system is disclosed for injecting dry medicaments in a gaseous suspension into the trachea of an animal. The system comprises: needle means for insertion into the trachea and having a passageway for directing the medicament into the trachea; medicament dispenser for dispensing the medicament into the needle means; a mask formed from substantially gas inpermeable material and shaped to fit over the mouth and nose of the animal having an opening for the movement of gas thereto; and regulator means adapted for connection to a supply of compressed gas connected to the mask and the needle means to time the discharge of compressed gas to the mask and the needle means to coincide with the animal's inhalation.