This Cat Pan has been a Miracle. I have two 16 years old critters that just could not balance in their previous cat litter box. This Cat Pan is just amazingly perfect. The walls are High, so when they go in to do their business it's INSIDE the cat pan. No More Squirting anything outside, the high walls are perfect to prevent all those unwanted outside cleaning of poop mess! The litter stays inside the pan too.