I live on the 2nd floor. A patio door opens onto a small deck--I have a bird feeder hanging from one of the railings [the hanger goes up, so the feeder is easily visible to my cat]. She was adopted last October, so there was only one time I had the glass door open before the cold set in. That one time, she spotted a bird on the roof and climbed the screen door nearly to the top. Needless to say, I have patches on the screen now. Is there a product or suggestion that will allow me to open the glass door and enjoy the air without having to be on guard constantly?