Door sweep / Pet blocker 

Our pet ferret loves to free roam in our home. Some of the doors in our home have a wide enough gap below them that she can squeeze her way under and allow her access to areas we don't want her to go. I've created this door sweep that fits on the door and closes that gap preventing her from getting under it. It is able to slide up to accommodate different gap sizes. The size of the part is 250mm long and for my door it took 3 of them to completely close the gap. I'm open to ideas on improvements and suggestions. Thanks!