California is now the first state to ban pet stores from selling animals from commercial breeders, thanks to a new law signed by Gov. Jerry Brown in October. Animal advocates say it will reduce what they claim is the needless suffering of animals like puppies, kittens, and rabbits bred for sale.

https://www.npr.org/2017/11/01/560933215/fears-of-a-black-market-after-calif-bans-some-commercial-breeding