Abstract: A lost pet retrieval collar receives a coded radio signal and activates a puncturing device to release gas from a pressurized canister to inflate a balloon creating a visual alarm that the pet is lost. The pet collar also contains information necessary to enable a passerby to contact the pet owner. In one embodiment, the puncturing device utilizes a spring loaded pin; in a second embodiment, the puncturing device utilizes a solenoid valve; in a third embodiment, a laser is employed.