Best Electronic Pet Doors

Electronic pet doors solve a specific problem: keeping raccoons, strays, and unwanted animals out of your home while still letting your own pet come and go. They split into two technical paths. Microchip readers (SureFlap is dominant) read the implanted ISO 11784 microchip your dog already has — no collar tag to lose, but the scan introduces a brief pause that some nervous dogs never adjust to. Motorized doors (High Tech Pet Power Pet, PetSafe SmartDoor) use a battery-powered collar tag and physically slide a rigid panel open on detection — they fully air-seal when closed, which is a real insulation advantage over any flap. Both categories rate lower on Amazon than passive flap doors, typically 3.9 to 4.3 stars versus 4.4 to 4.6, and the gap is almost entirely about battery life and motor wear, not selectivity. AKC's pet-door guide recommends matching the flap aperture to your dog's shoulder height plus one inch — most microchip models are sized for cats and small dogs only, so confirm flap dimensions against your dog's actual measurements before buying. If you have a medium or large dog with a wildlife problem, a motorized door (High Tech Pet PX-2) is usually the only viable answer.