We have had an ongoing problem with our two dogs and the doggy door we cut into the wall of our house. The doggy door, badly insulated, and not sturdily manufactured, plus the fact that it is at ground level and tends to let leaves blow in with the dogs, and just all the time lets in cold air, thus we have to close with the bendable tin door that comes with it, because the air lock flap does not seem to work either. The dogs, unable to get out the doggy door to go, end up going on new carpet. Going on = On going.
Yesterday Downtown Dad had a Whack Upside The Head moment while hanging out at the newly opened Menards 3/4 of a mile from our house, that may provide a fix to our Ongoing/going on problem!
He was wandering up and down the aisles, drooling... er, um, perusing all of the cool and groovy home improvement wares, when he came across a window. He stopped. He cocked his head to the side, and then, he saw it! The window was really a miniature sliding glass door for the dogs! He installed it about 3 inches from the ground and put an airlock flap on the outside and voilla! An airtight, doggy door that can stay open and remain relatively air tight, or be closed as easily as a window.
He's a genius!