If you have finally taken the dive from “casual cat lover” to “I can’t quite remember how many cats I own but I think it’s somewhere north of four,” welcome, you’re among friends. Anyone who lives with multiple cats knows that it requires a lot to keep things running smoothly. Cats need a ton of attention, even though they pretend they don’t. If you want to appease your cat overlords, these are the items you absolutely need for a multicat household, from a giant cat tree to a good litter box and more.