A method and device for training a canine to detect certain compounds is disclosed. A training aid material delivery device (TAMDD) includes a reservoir for a compound and capillary tube for allowing the diffusion of the compound into a testing area. Dimensions of the capillary tube can be changed to alter the diffusion rate and total diffused quantity of a compound. A trainer uses a series of smaller diameter and/or longer length capillary tubes to train the canine's scent detection ability. The TAMDD is low cost, comprised of durable and inert materials, has customizable emission rates, and delivers a consistent scent/odor profile during training sessions.
