Portable transmitter transmitting to a recevier the location of pets on a real-time basis; Global positioning systems (GPS) consisting of computers, computer software, transmitters, receivers, and network interface devices for use in locating and tracking pets that carry radio frequency identification (RFID) tags; radio frequency identification (RFID) tags for the purpose of locating and tracking pets; pet containment systems using radio frequency (RF) devices consisting of computers, compute...