Abstract: A device for shaping the behavior of an animal using a behavior marking and reward delivery system is provided. The compact behavior shaping device includes a battery, a trigger assembly, a receiver, a spring assembly, and a bore assembly, and is capable of storing and propelling commonly used motivational items, such as food, toys, dummies, tugs, balls, prey items, and other such objects, over a range of approximately 1 to 50 feet. The animal trainer manually compresses the spring assembly, which is then engaged by the trigger assembly. When the receiver receives a signal from a transmitter, it triggers the release of a motivational item from the device by activating the trigger assembly and/or triggers the occurrence of a marking event, such as a noise. A variety of wired and wireless transmitter devices, such as a hand-held transmitter, a motion sensor, a pressure sensor, and/or a shock sensor may be used to transmit the signal to the receiver.