A security system configured to be attached about the neck of a dog, includes a collar having opposed ends, each end having a fastener such that the belt is configured to be selectively coupled about the dog's neck. A monitoring assembly is mounted to the collar, the monitoring assembly including a microphone and a processor in data communication with the microphone. A transmitter is operatively connected to the processor. A response assembly is displaced from the monitoring assembly that includes a speaker in data communication with the processor, the processor configured to selectively actuate the speaker when the processor determines that the microphone has detected a predetermined sound, such as the bark of an intruding dog. The displaced speaker may then emit the sound of a menacing guard dog until the sound of an intruding dog is no longer detected.
