aha! Baby Houdini eh? You know, looking at it set up, I had the same thought. Two places at the bottom DO look large enough to possibly squeeze through.....possibly but unlikely - at each front corner where the door closes. Right now, we placed a thick rug and it rolls up to partially obstruct that area. I think what else may work is to place some foam *under* the bottom tray to lift it higher - as it appear those larger opening are the only places that they could escape. I will look it over more though. We bought it at PetSmart - possibly the same one?? They had several to chose - this was actually the second to the smallest dog size. 24"L 20"W 21"H and the brand is Bargain Hound.
hmmmm..I just measured and the largest distance between rungs is just a tad under 1.5 inches. Lizzie got out of THAT??
I am in trouble - what a stinker!!