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  • Title: Characterization of animals with microchips entering animal shelters.
    Author: Lord LK, Ingwersen W, Gray JL, Wintz DJ.
    Journal: J Am Vet Med Assoc; 2009 Jul 15; 235(2):160-7. PubMed ID: 19601734.
    Abstract:
    OBJECTIVE: To characterize animals with microchips entering animal shelters and the process used to find owners. DESIGN: Cross-sectional study. ANIMALS: 7,704 microchipped animals entering 53 animal shelters between August 2007 and March 2008. PROCEDURES: Data for animals with microchips were recorded by participating animal shelters and reported monthly. RESULTS: Of 7,704 animals, strays accounted for slightly more than half (4,083 [53.0%]), with the remainder classified as owner-relinquished animals (3,225 [41.9%]) and other (396 [5.1%]). Of 3,425 stray animals for which animal shelters reported that the owner was found, a higher percentage of dog owners (2,191/2,956 [74.1%]) than cat owners (298/469 [63.5%]) was found. For 876 animals for which the owners could not be found, the main reasons were incorrect or disconnected telephone number (310 [35.4%]), owner did not return telephone calls or respond to a letter (213 [24.3%]), and animal was registered to another group (151 [17.2%]). Of 1,943 animals for which animal shelters contacted a microchip registry, 1,129 (58.1%) were registered in the database. Purebred neutered dogs whose owner information was in the shelter database registry or microchip registry had a higher likelihood that the owners would be found. CONCLUSIONS AND CLINICAL RELEVANCE: The high rate for return of microchipped dogs and cats to their owners supported microchipping as a valuable permanent pet identification modality; however, issues related to registration undermined its overall potential. Bundling of microchip implantation and registration, point-of-implantation data registration, use of annual compliance and update reminders, and providing access to all registries are potential solutions.
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