Just to add to my other comment, It also helps where I live. I have a small old two story house with a basement, so there’s 3 levels and lots of little nooks and crannys for them. I have several litter boxes in the basement and on the main floor as well, along with 3 water stations and 4 main food bowls. (Although for wet food and treats I usually have to also break out some dishes so they get a more equal distribution, especially because of Moops (second grey cat down from the top right of the pic) who is very much a food orientated cat, and likes to hoover up as much a he can before anyone else gets a chance.