An attachment and method for a fence system to prevent a pet from escaping a fenced comprising at least one first support member adapted to be attached substantially horizontally to at least a portion of the fence system, a plurality of second support members adapted to be attached substantially vertically to the at least one first support member, and a plurality of inserts adapted to be received within the plurality of second support members. Each of the plurality of inserts is capable of extending out of a lower portion of the each of the plurality of second support members upon digging the fenced area by the pet animal such that the extended plurality of inserts block the dug area to prevent the pet animal from escaping the fenced area.