Pet spray training system

An animal behavior modification device is provided. The device includes a sound or motion sensor that is configured to generate electrical signals in response to an occurrence. The device may include a filter, which is tuned to recognize sound frequencies received by and emitted in proximity to a microphone, and generate an electrical signal in response to recognizing sound frequencies characteristic of a dog's bark. The device further includes a canister that holds a deterrent fluid at substantially ambient pressure. The device additionally comprises a pump configured to draw fluid from the canister in response to the electrical signal from the filter. The pump has a spray nozzle for releasing an emission of the fluid that affects the dog's senses. A method of modifying the behavior of an animal using the device is also provided herein.