Dog door advice, question and install

[hollohas]

I have an in glass Hale pet door. It goes right in your existing sliding glass door. Guy comes out, measures your door. A few days later he comes back with a new piece of glass (dual-pane, low-e, all that jazz) with the dual-flap pet door installed, takes your existing glass out and puts the new in. You keep the old glass if you want. You can fully open the glass door and it closes, locks and seals as good as the original door because it is the original door frame. Plus you don't have to put a hole in your wall. If you decide to move and the new owners don't have dogs, you can put the old glass back in. I love it.

The only issue is even when I open the door my dog tries to beat me out through the doggie door...that's a moving target.

Install took the guy about 20 mins.