The most obvious challenge to a state mandatory spay/neuter law is: How could it ever be enforced? It’s hard enough to identify problem pets’ owners, let alone the animals’ ages or reproductive capacities. Supporters of Levine’s proposal cite a similar, purportedly successful, measure in Santa Cruz County. But that just raises another question: Aren’t local municipalities, which have differing needs and populations (human and animal) better able to determine such policies for themselves? Not all solutions are one-size fits all. And the answer to every problem isn’t necessarily a state law. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! IF Van Nuys Assemblyman Lloyd Levine gets his way – and a recent committee vote suggests he might – it will soon be illegal to have an unfixed dog or cat in California. With the exception of pet breeders and a few others, anyone found in possession of a fertile dog or cat more than four months of age will be subject to a $500 fine. All of which sounds harmless enough. Irresponsible pet owners are the scourge of many a neighborhood, and no one likes to see animal shelters filled with unwanted dogs and cats that usually end up getting euthanized. But good intentions alone don’t make for good law.