Does This High-Tech Doggie Door Keep Out Unwanted Creatures?

Cindy Akiyama says the only thing that goes through her doggie door is her dogs. That's because she uses a high-tech doggie door that will only open and close for her own pets. They wear special ultrasonic collars that will only activate the door when they are near. Now, sneaky creatures, like deer and gators, will never darken her doorstep again