Sensitivity of commercial scanners to microchips of various frequencies implanted in dogs and cats

Objective —To evaluate the sensitivity of 4 commercially available microchip scanners used to detect or read encrypted and unencrypted 125-, 128-, and 134.2-kHz microchips under field conditions following implantation in dogs and cats at 6 animal shelters. Design —Cross-sectional study. Animals —3,949 dogs and cats at 6 animal shelters. Procedures —Each shelter was asked to enroll 657 to 660 animals and to implant microchips in 438 to 440...