Why Does My Cat Scratch the Sides of the Litter Box?
Uncover the reasons behind your cat's litter box scratching habits and learn practical solutions to stop excessive digging behavior.
Observing your cat vigorously scratching the sides of the litter box can be puzzling, but this behavior is rooted in natural feline instincts and practical needs. Cats scratch litter box sides primarily to bury waste, mark territory, or signal dissatisfaction with their setup, such as uncleanliness, insufficient litter depth, or an ill-fitting box.
Is It Normal for Cats to Scratch the Litter Box?
Yes, scratching in and around the litter box is completely normal and healthy cat behavior. In the wild, cats dig to bury their feces and urine to hide from predators and avoid territorial challenges from other cats. Domestic cats retain this instinct, using litter to mimic soil for covering waste, which helps maintain hygiene and subtle scent communication via paw glands.
During this process, cats may paw at the litter’s edges, inadvertently or intentionally scratching the box sides to scoop more material. This ensures thorough burial, preventing odors from attracting threats. Kittens, adults, and seniors all exhibit this, confirming it’s innate rather than learned.
Why Do Cats Scratch the Sides of the Litter Box After Pooping?
Post-elimination scratching targets the farthest edges to gather maximum litter for burial. Cats dig a hole before using the box to avoid soiled spots or other cats’ scents, then cover afterward. Side-scratching occurs when they stretch to reach litter pushed against walls or when the box confines their movements.
Your cat might change spots multiple times, scratching sides each time to test cleanliness. This behavior also distributes scent from paw glands, reinforcing subtle territory claims without overt marking.
Reasons Your Cat Might Be Scratching Excessively
While occasional scratching is fine, excessive side-scratching signals issues. Common culprits include:
- Dirty litter box: Cats demand cleanliness; a soiled box prompts frantic digging for a fresh spot. Scoop daily, or twice for multi-cat homes.
- Insufficient litter depth: A shallow layer (under 2-3 inches) frustrates burial attempts. Add more to allow proper digging.
- Wrong litter box size: Ideal boxes are 1.5 times the cat’s length. Small boxes cramp movements, leading to side-banging.
- Litter type mismatch: Recent switches to scented, clumping, or coarse litters can provoke rejection. Revert to preferences like fine-clumping unscented.
- Hooded or covered boxes: Many cats dislike enclosures due to trapped odors, poor visibility for predators, and confinement.
Placement matters too: Noisy, high-traffic spots heighten stress, increasing scratching. Relocate to quiet areas.
Covered vs. Open Litter Boxes: Which Do Cats Prefer?
Covered boxes appeal to owners for odor control and spill reduction, but cats often reject them. Enclosures mimic caves where predators ambush from behind, triggering escape instincts despite home safety.
Odors concentrate inside hoods, worsening perceived dirtiness and prompting deeper scratching. Open boxes allow 360-degree views, privacy without claustrophobia, and easier entry/exit, especially for seniors or large breeds.
| Feature | Open Litter Box | Covered Litter Box |
|---|---|---|
| Predator Visibility | Full view | Limited |
| Odor Control | Moderate | Better but traps for cat |
| Scratching Frequency | Lower | Higher due to frustration |
| Best For | Most cats | Shy cats preferring privacy |
Scratching Outside the Litter Box, Floors, or Walls
External scratching often indicates a very dirty box; cats seek hard surfaces to simulate digging or sharpen claws. Clean with mild soap (no ammonia, which mimics urine and deters use). Provide scratching posts or pads nearby to redirect.
In multi-cat homes, side-scratching leaves scent marks for housemates, claiming the box without conflict.
How to Stop Your Cat from Scratching the Litter Box Sides
Address root causes systematically:
- Deepen litter: Maintain 3-4 inches for effective burial.
- Upsize the box: Measure your cat; opt for extra-large low-sided models.
- Enhance cleaning: Scoop daily, full changes weekly. Use enzymatic cleaners safe for cats.
- Test litter types: Transition gradually; unscented clumping is popular.
- Switch to open box: Monitor acceptance; add familiar litter to ease.
- Optimize location: Quiet, accessible spots reduce stress.
- Check health: Excessive visits with little output signal UTIs, constipation, or blockages—vet immediately, especially males.
Observe for 1-2 weeks post-changes. Persistence warrants professional behaviorist input.
Health Issues That Cause Excessive Litter Box Scratching
Beyond setup, medical problems amplify digging:
- Urinary tract infections (UTIs)/cystitis: Frequent small urinations, straining, blood. Emergency for males.
- Constipation: Prolonged digging without feces; pain signs like lethargy.
- Diabetes/hyperthyroidism: Increased volume prompts more covering attempts.
Rule out via vet exam, urinalysis. Treat underlying issues to normalize behavior.
Frequently Asked Questions (FAQs)
Why does my cat scratch the walls near the litter box?
Cats extend digging to walls/floors to maximize litter coverage, ensuring complete burial. It’s normal but excessive if box is unclean or undersized.
Why does my cat dig in the litter box for so long?
Long digging signals unhappiness: dirty box, wrong litter, poor location, or health woes. Clean more, adjust setup.
Is scratching the litter box sides a sign of stress?
Possibly, if sudden/excessive. Combined with hiding or aggression, check for changes like new pets or moves.
Should I punish my cat for litter box scratching?
No—it’s instinctual. Punishment increases stress, worsening issues. Focus on environment tweaks.
How often should I clean the litter box?
Daily scooping; weekly deep clean. Multi-cat: 2x daily.
References
- Why Is My Cat Scratching the Litter Box? — Purina Canada. 2023. https://www.purina.ca/articles/cat/litter/why-is-cat-scratching-litter-box
- Why Does My Cat Scratch the Sides of the Litter Box? — Cats.com. 2024-01-15. https://cats.com/why-does-my-cat-scratch-the-sides-of-the-litter-box
- Why Does My Cat Scratch the Sides of His Litter Box? — UAH Pet. 2023-05-20. https://www.uahpet.com/blogs/post/why-does-my-cat-scratch-the-sides-of-his-litter-box
- Diagnosis and Management of Feline Lower Urinary Tract Disease — American Veterinary Medical Association (AVMA). 2024. https://www.avma.org/resources-tools/literature-reviews/diagnosis-and-management-feline-lower-urinary-tract-disease
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