My cats don't know how to use the litter box correctly.
My cats ARE litterbox trained but they can't figure out how to cover "it" up. Instead of using the litter to cover stuff, they try scratching at the sides of the litter box. We thought that getting a covered box would help because they wouldn't be able to grab the side as easily. But it didn't help at all. So my male cat spends A LOT of time trying to cover his messes but never gets anywhere since obviously he can't cover it with the side of the litter box!
Anyone have any ideas? We have 2 cats that are brother and sister and they both do this.