California’s ferret ban has long been justified as “protecting wildlife.”
But when LegalizeFerrets.org commissioned a formal environmental review, the results didn’t fit the narrative—so the Department quietly rewrote them.
Dr. Gary Graening’s original report concluded that no feral ferret populations exist in the United States and that ecological risks to California were extremely low.
Yet the “peer-reviewed” version published by the Department softened the language, replacing “no evidence” with “no confirmed populations.”
Later, an internal CDFW memo went further, reviving 30-year-old myths about rabies and predation to justify keeping ferrets illegal.
Each retelling moved farther from science and closer to policy defense.
If evidence doesn’t support a policy, the policy should change—not the evidence.