If doggie door security is an issue with you then we have your solution. This Pet-Tek Pet Door with Security Cover is your solution.
When you are away, or when you go to bed at night, you can place the security cover over the door so no one, and nothing, can enter your home.
This attractive, easy to install pet door is draft-resistant with a weather-seal flap. It fits all doors and walls made of wood, metal, and PVC from 3/16 to 1 9/16" thick.. It is manufactured with durability and security in mind with its virtually unbreakable flap made of polycarbonate which is the same material used for bulletproof vests and aircraft windows. Stainless steel screws are an included upgrade to prevent rusting.
A four way locking dial allows you flexibility with your pet's movements. The “In and Out” position simply allows your pet to go inside and outside as he pleases. When you flip the switch to “In Only” your pet is allowed to come inside but cannot leave the home without your permission. If you choose “Out Only” your pet can leave the house and will not have access to return inside when you are not home.