Supply Chain History
From stolen pets to purpose-bred monopoly — how the beagle trade evolved
Why Beagles Became the Standard
The beagle's rise as the emblematic laboratory dog is tied to expanding pharmacology in the 1950s and the thalidomide crisis of the 1960s. After thalidomide, regulatory agencies worldwide tightened preclinical testing requirements. International guidance (ICH M3(R2)) expects safety data from two mammalian species — a rodent and a non-rodent — and dogs became the default non-rodent.
The breed offered practical advantages for industrial-scale research: docile temperament, manageable size, well-characterized physiology, and the ability to maintain large, genetically consistent colonies. By the end of the 20th century, the purpose-bred beagle was the global standard for many toxicology applications.