The Litter Box: How Many, Where, and Which Litter
Most litter box problems are solved not by punishment but by the size and placement of the box. Rules that actually work.
A cat who goes outside the litter box is almost never taking revenge. Usually something is bothering her or something hurts. So check her health first, and then the setup.
How many boxes
The general rule is the number of cats plus one. For one cat, two boxes; for two cats, three. Place the boxes in different spots, otherwise the cat sees them as one big toilet.
What size
The box should be about one and a half times the length of the cat, not counting the tail. Store-bought boxes are often too small. A large plastic storage bin with an entrance cut into it works well. Kittens and older cats need low sides.
Where to put it
A quiet spot with easy access, away from the washing machine, food bowl, and bed. A covered box seems more convenient to people, but cats often find it cramped and stuffy, and it has only one way out. If in doubt, offer an open box next to it and see which one she chooses.
Which litter
Most cats prefer a fine-grained, unscented clumping litter. Fragrances appeal to people, not to cats. It is best to switch litter gradually, mixing the new one with the old over a week or two.
How often to clean
Scoop the clumps at least once a day, ideally twice. Wash the whole box every one to two weeks with warm water and a mild cleaner without chlorine or a strong smell.