Universal Press Syndicate When a cat likes the litter, the animal is more likely to use the box.

Let your cat choose from a litter buffet. Buy at least four different types of litter. Choose at least one that is the clumping kind -- the No. 1 choice of most cats. Fill each box with at least 2 inches of litter, and watch her exercise her opinion. When it comes to litter choices, you'll be happier when your cat is happiest.

Donate the rejected brands to a local shelter, but save the boxes. Keep your cat happy by washing the litter box monthly with soap and water. As an insurance policy against one of the biggest cat behavior complaints -- house-soiling -- replace the litter box with a new one every six to 12 months. Don't risk having your feline choose an undesignated area as her new fresh-scent toilet.

You can bleach plastic as long as your cat is through with it. (Cats often reject bleached toilets.) You can go green by using the old, disinfected boxes for other uses. Plant marigolds or place garden tools in them, among other options.

But do give your cat the choice. Just as some people are picky about one-ply toilet paper versus two or fragrance vs. none, some cats are sensitive to the smell and feel of their litter.

Animal behavior experts Susan and Roland Tripp are the authors of "On Good Behavior." For more information, visit their Web site at AnimalBehavior.net.