I really recommend sliding doors for many reasons. The doors don't get in the way. No obstructed front view from door frames. It doesn't take much to secure a sliding door, but there is a tiny gap between the 2 pieces of glass. The gap isn't to big. I think only tiny babies could escape. Maybe a baby cornsnake, milk, or king could escape. You could put a strip of weather strip between the glasses. I think cleaning is a snap with sliders. Glass is pretty inexpensive. What are you keeping in your cages? Hope this helps. Derek

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