Dog doors are great accessories for kennels and homes with pets. Dog doors allow pets to exit and re-enter the house without you have to open the door for them. However, you should have a way of securing the dog door to prevent dogs from leaving when they shouldn't and prevent others from getting in uninvited when you're not around. If you have the Gun Dog Big Dog Door installed on your property, you can use the Gun Dog In Closing Panel for Big Dog Door.
This closing panel is easy to use. It is made of polypropylene and is 1/4" thick. This is a handy item to have for kennel facilities, where there are multiple dogs.