"Ferrets are illegal in CA because they are part of the weasel family...and known to, if given the opportunity, eat/get chickens. Because CA has so much agriculture and large chicken market, the farmers wanted them banned.

Ferrets are not illegal to treat or buy for in CA, only to own and import into the state."

This is what our vets told us at work...a lot of people ask this question. I would call a vet in your area, they would know for sure.