Keep your cat indoors. Unlike dogs, it is nearly impossible to confine a cat to a yard. This can lead to many dangers for your cat, from cars, dogs, diseases from feral cats, and simply disappearing to parts unknown. Loose cats also are a nuisance to others, often killing songbirds and leaving unwelcome "deposits" in neighbor's gardens. If your cat really enjoys the outdoors, they can be trained to wear a harness and leash or you can invest in a specialty cat fence or screened-in porch.