Both litter boxes have been thoroughly cleaned and disinfected, and they all work perfectly. I found that the Omega Paw litter boxes catch some clean litter when sifting, so I drilled holes into the pull-out trays so that there's absolutely no waste of clean litter. This is an exclusive modification that you can't find anywhere else, but you could perhaps recreate it yourself! The Omega Paw litter boxes also come with an extra pull-out tray in case something happens to one of them. The extra tray also includes the modifications. One of the litter boxes as has the grating section zip tied to the box to make it hold more steady, as can be seen it the photos. You can simply cut them off if you don't like. I can do this to the other one too if you like and want both. 30 each or 50 for two of them. 4 for extra scoop or free if you get both Please message me if you're interested. Thanks! (contact info removed)