Where dog doors have their advantages, it also has some disadvantages. If though they are used for specific pets, they might become the passage of movement for various other intruders. They can easily attract a lot of stray dogs and cats as well. It can give access to any small-sized creature, to effortlessly crawl through it and enter the homes. To curb such aggravations, an electronic door is preferred over any other, regular dog door. They are also known as smart dog doors and come with a set of advanced features.rnrnElectronic dog doors use the technology of radio frequency identification. A microchip embedded collar key is put up on the dog. This chip controls the opening and closing of the door. As soon as the pet, which has the key installed on its collar, heads near the door, the door automatically opens for it. The flap remains closed as long as it opens through the key. This helps in keeping the stray animals from opening the flap by itself and entering the house.