The Mekong Bobtail traces its ancestry to the ancient temple cats of Southeast Asia, where naturally short-tailed felines have been documented for centuries across the regions now comprising Thailand, Vietnam, Laos, Cambodia, and Myanmar. These cats are believed to have developed their distinctive bobbed tails through a naturally occurring genetic mutation that became fixed in local populations long before any formal breeding programs existed. Archaeological and textual evidence from the region suggests that bobtailed cats were a familiar sight in royal courts and Buddhist monasteries well before European explorers arrived in the area.
The breed's geographic namesake, the Mekong River, serves as an apt metaphor for the cat's historical range. The Mekong flows through six countries in Southeast Asia, and bobtailed colorpoint cats matching the Mekong Bobtail's description have been found across this entire watershed. Local populations maintained these cats for generations without any concept of breed standards, valuing them simply as companions and protectors of homes and temples. The cats' shortened tails were often regarded as a mark of distinction or spiritual significance rather than a deformity.
Historical Thai manuscripts, including texts associated with the Tamra Maew, a collection of cat poems dating to the Ayutthaya Kingdom period between the fourteenth and eighteenth centuries, describe several varieties of cats with crooked or shortened tails alongside colorpoint markings. While the Tamra Maew is most frequently associated with the Siamese and Korat breeds, some scholars have noted that certain descriptions align closely with the physical characteristics of the Mekong Bobtail. These manuscripts were considered important cultural documents, often kept within temple libraries and passed between monasteries.
Unlike many Western cat breeds that were developed through deliberate selective breeding, the Mekong Bobtail evolved largely through natural selection and the preferences of the communities that kept them. The cats that survived and thrived in the warm, humid climate of the Mekong region were naturally robust and resistant to the parasites and diseases common to tropical environments. Their bobbed tails, colorpoint coats, and sociable dispositions are all traits that were preserved by the cats' own reproductive success within their native range rather than by human-directed breeding programs.