Given that ferrets are legal to keep as pets in Arizona, Nevada, and Oregon, it's probably not terribly difficult to quantify the ecological and agricultural im

Given that ferrets are legal to keep as pets in Arizona, Nevada, and Oregon, it's probably not terribly difficult to quantify the ecological and agricultural impact in places similar to California. I don't know if any such research has been done, but I suspect if it was done and found significant harm, there would be a movement to ban ferrets in one or more of those states. My very brief web search did not find one.