Talk to neighbors and ask them to watch for your pet. Give them a copy of your flier. Don't assume your pet has been stolen. Someone who finds your pet may hold onto it before bringing it to a shelter. Pets have been returned months, and even years, after disappearing.
Intact animals are more likely to wander.
Keep your pet confined. Sonoma County has a strict leash law. There are also fences and enclosures available that will keep your cat confined to your yard. Call us for more advice about keeping your pet confined, and about keeping an indoor cat happy. Keep current identification on your pet.