A device for brain stimulation that includes n lead having a longitudinal surface; at least one stimulation electrode disposed along the longitudinal surface of the lead; and at least one recording electrode, separate from the at least one stimulation electrode, disposed along she longitudinal surface of the lead. The device comprises a double ended clip hook with a flattened, contoured c-shape hook at both its two ends. The novel balun according to the embodiments of the present invention has a small size but a large power capacity and low cost, and can be used in a magnetic field environment. The maximal elements are extended. Alternatively, multiple trays are included with the bottle. Magazine stop tabs at the base of the magazines along with the retaining plate mounted on the chute lid prevent the dispenser from dispensing more than one dog treat at a time.