Microchipping is the best way to identify your dog if they are stolen. It is a small chip that is implanted under your dog's skin.
Make sure your dog's collar has their name, address, and phone number on it. This will help the police return your dog to you if they are found.
Avoid walking your dog in isolated areas, especially at night. If you must walk your dog in a dark area, take a friend or family member with you.
When you are out with your dog, be aware of your surroundings and watch out for suspicious people.
Never leave your dog unattended in a car, even for a short time. Dogs can quickly overheat in hot weather and can die if they are left in a car.
If you have a garden, make sure your fence is secure so that your dog cannot escape.
There are a number of pet recovery services that can help you find your dog if they are stolen. Register your dog with one of these services.