A pet-activated signaling device, a pet-activated signaling system, and a method of a pet signaling a human is provided. The pet-activated signaling device includes a belt, a transducer, and multiple bells. The transducer, which emits an electromagnetic signal, and bells, which emit an audible signal, are attached to the belt. The pet-activated signaling system includes the signaling device and a receiving device which emits an alert when a signal is received from the signaling device. The method of a pet signaling a human includes pawing at the pet-activated signaling device suspended from a door handle to activate the transducer and the bells. The invention is particularly useful for use on an exterior door, allowing a dog to use a familiar method of alerting a human to open the door even if the bells are not heard by the human.