Colin FosterBy Colin Foster

Updated November 2026

Cats usually poop in the bathtub because the tub feels like a safe, quiet, low-traffic spot that the litter box isn’t providing. The most common reasons are a dirty or poorly placed litter box, stress from household changes, or a health problem that makes the box uncomfortable. Figuring out which one applies to your cat is the first step to stopping it.

Why Cats Choose the Bathtub

A cat’s choice of bathroom spot is rarely random. Cats look for privacy, easy access, and a surface they can dig in. A bathtub often checks all three. It is usually out of the way, it is smooth and easy to clean in the cat’s mind, and it may be the only spot with no foot traffic. If your cat is going there, she is telling you the litter box is not meeting one of those needs.

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Cats are also very sensitive to smell. Ammonia from urine builds up quickly in a box that is not scooped daily, and many cats will avoid a box that smells strong. If the bathtub is the only clean-smelling spot in the house, it becomes the obvious choice.

Common Factors Behind the Problem

Several things tend to push a cat out of the litter box. Check these before you assume the bathtub itself is the issue.

  • Dirty litter. Most cats want the box scooped at least once a day and fully emptied and refilled every one to two weeks.
  • Box placement. A box next to a noisy washing machine, in a high-traffic hallway, or beside the cat’s food can make her avoid it.
  • Box size or style. A box with high sides or a covered hood can be hard for older or arthritic cats to enter. A box that is too small may cause her to step outside it.
  • Litter type. Strongly scented litter or a texture she dislikes can drive her elsewhere.
  • Stress or changes. A new pet, a move, new furniture, or a new person in the home can disrupt litter habits.
  • Pain or illness. Constipation, painful digestion, or joint problems can make the box uncomfortable, so she looks for another spot.

How to Stop Bathtub Pooping

Most cases improve once you address the underlying cause and make the bathtub less appealing. Work through these steps in order.

  1. Scoop the litter box at least once a day and wash the box with mild unscented soap every few weeks.
  2. Use one more box than you have cats, placed in a quiet spot with an easy exit.
  3. Keep the box away from food, water, and loud appliances.
  4. Try an unscented, fine-grain litter that your cat seems comfortable with, and switch gradually if you change brands.
  5. Block access to the bathtub while you fix the problem. Close the bathroom door, or place a cover over the tub.
  6. Clean the tub thoroughly with an enzymatic cleaner so the smell does not draw her back.
  7. Schedule a vet visit if the behavior is new, or if you notice straining, blood, diarrhea, or weight loss. Pain and digestive problems are common reasons cats stop using the box.

If your cat is also leaving droppings elsewhere, you may find more ideas in Why Does My Cat Poop on the Floor? 6 Causes and Fixes. For cats who go outside the box in general, Why Does My Cat Poop Outside Her Litter Box? Causes and Fixes covers several related causes.

What We’d Use

A covered or uncovered box with lower sides is often easier for cats to use, especially for seniors or cats with mobility issues. Try a large, low-entry model such as the Petmate Booda Dome Cat Litter Box.

An enzymatic odor remover helps break down the proteins in cat waste so the bathtub stops smelling like a toilet. Products like Nature’s Miracle Advanced Stain and Odor Remover are widely used for this purpose.

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FAQ

Will my cat stop pooping in the tub once I clean the litter box?

Often, yes, especially if the box was the main problem. Give it a few weeks of consistent cleaning before you decide it has not worked, and keep the tub blocked during that time.

Could a new cat or pet cause this?

Yes. Tension between cats can make one avoid the shared box. Adding a second box in a different area often helps.

When should I see a vet?

See a vet if the behavior starts suddenly, if your cat strains or cries while pooping, or if her stool changes in color, consistency, or frequency. These can signal a medical problem that needs professional care.

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Colin Foster

About Colin Foster

Colin Foster is part of our editorial team and reviews and edits our cats guides, checking product details against manufacturer specifications and owner feedback.