How do I secure a dog door from intruders?
All Endura Flap® Pet Doors, except Kennel Doors, ship with a Locking Cover. The Locking Cover is made with a durable, molded ABS plastic in a three-dimensional shape for increased strength.
It is as strong a 1/16" sheet of steel and has a clip lock for added security. It can be used when away for extended periods and especially at night when the nocturnal, troublesome creatures are out and about. If you installed a pet door for a dog, it probably is the best deterrent of all.
Here are a couple of other options for those who need super-security.
You can purchase a Watchdog Steel Security Pet Door Cover. It's mounted over the exterior pet door frame and secures with a combination lock for the ultimate deterrent.
Lastly, there are many types of electronic security options to explore, depending on your needs.