An insulator for notifying an animal when an electric fence is provided. The insulator may include a clip for attaching the insulator to the fence. Metal contact points may draw power from the electric fence when the fence is active, or the insulator may be powered through induction. The insulator may also include a circuit board or controller that receives power from the fence and translates it into an output directed to a notification device. The notification device may comprise a light that produces a visual notification or a speaker that produces an audible notification.
