What excessive litter box scratching usually means
A cat that scratches constantly at the litter box is usually trying to bury waste more thoroughly than normal, which points to one of three problems: the litter itself doesn't feel right, the box is too small or dirty, or your cat is stressed or unwell. Most of the time it's the litter—cats are particular about texture, and switching brands or letting litter get old can trigger frantic digging. The second most common cause is a box that's too cramped or hasn't been scooped recently enough. Less often, excessive scratching is a sign of digestive upset, stress, or a medical issue that needs a vet's attention.
The key is that normal scratching—a few swipes to cover waste—is healthy behavior. What you're noticing is probably excessive scratching: your cat digging for a minute or more, or scratching at the sides and bottom of the box as if trying to dig through it. That's the signal something has changed.
Key Takeaways
- Litter texture changes are the most common trigger—cats often reject new brands or litter that has absorbed moisture and clumped unevenly.
- A box that is too small, too dirty, or has a hood that feels confining can make cats scratch excessively while searching for a clean spot.
- Digestive problems, stress from household changes, or medical issues like parasites or urinary tract infections can cause abnormal scratching behavior.
- Scooping at least once daily and replacing litter completely every week prevents most litter-related scratching problems.
The litter itself is usually the culprit
Cats have strong preferences about litter texture, and even a small change can trigger excessive scratching. If you recently switched brands, your cat may be rejecting the new one because it feels wrong under their paws—too coarse, too fine, too dusty, or not clumping the way they expect. Some cats also dislike scented litters or litters with added odor-control chemicals. The solution is straightforward: go back to the old brand, or if you need to switch, do it gradually by mixing the old and new litter over a week so your cat adjusts.
Old or moisture-logged litter also triggers scratching. If litter has been sitting in the box for more than a week, or if your bathroom is humid and the litter has absorbed moisture, it clumps unevenly and feels different. Cats will dig frantically trying to find a clean, dry spot. Replace the entire contents of the box at least once a week, and scoop out waste at least once daily—twice daily if you have multiple cats or a cat that uses the box frequently.
The box itself may be too small or too dirty
A litter box should be at least 1.5 times the length of your cat's body, measured nose to tail. If the box is cramped, your cat can't position themselves comfortably to dig and cover waste, so they scratch frantically at the sides and bottom instead. Covered boxes or boxes with hoods can feel even more confining, especially if your cat is large or anxious. If you're using a small box or a covered one, try switching to a larger open box and watch whether the scratching stops.
A dirty box is another reason cats scratch excessively. Even if you scoop daily, if the box smells strongly of urine or waste, your cat may scratch at the bottom and sides trying to find a clean corner. Some cats are more fastidious than others and will refuse to use a box that doesn't feel pristine. Scooping twice daily and doing a complete litter change weekly usually solves this. If your cat is still scratching after you've cleaned the box thoroughly, the problem is likely the litter type or a health issue, not cleanliness.
Stress and household changes can trigger scratching
Cats scratch excessively at the litter box when they're stressed or anxious. Common triggers include a new pet in the house, a move to a new home, a change in your schedule, or loud noises. When stressed, cats sometimes obsess over their litter box behavior, scratching more than necessary as a way to self-soothe. If you've had a recent change in your household, that may explain a sudden increase in scratching even if nothing else has changed.
The fix depends on the stressor. If a new pet is the cause, give your cat a separate, quiet space with its own litter box away from the new animal. If the stress is from a move or schedule change, keep the litter box in a consistent, quiet location and maintain a routine for feeding and play. Some cats benefit from a Feliway diffuser, which releases a synthetic version of the calming pheromone cats produce naturally. These plug into an outlet near the litter box and can reduce stress-related behaviors within a few days.
Medical issues that show up as litter box scratching
Excessive scratching can signal a health problem. Digestive upset—from a food change, eating something they shouldn't, or an infection—makes cats feel the urge to dig and cover more urgently. Parasites, even if you've treated for them recently, can cause the same behavior. Urinary tract infections or other urinary issues make cats uncomfortable and cause them to scratch at the box more than usual, sometimes combined with frequent trips to the box or straining.
If the scratching started suddenly, is paired with other changes like vomiting, diarrhea, loss of appetite, or frequent urination, or if it continues after you've ruled out litter and box problems, contact your veterinarian. A vet can check for parasites, digestive issues, and urinary problems with a physical exam and, if needed, a stool or urine sample. Don't wait if your cat is also showing signs of pain or distress.
How to troubleshoot step by step
Start with the easiest fixes first. Scoop the box thoroughly and replace all the litter with fresh litter of the same brand your cat has been using. Watch for a few days to see if the scratching decreases. If it does, the problem was old or dirty litter, and you're done—just maintain the routine.
If scratching continues, check the box size and type. Measure the box against your cat's body length and consider switching to a larger, open box if you're using a covered one or a small model. Again, wait a few days to see if behavior improves. If the scratching still hasn't stopped, try switching back to a different litter brand your cat has used before, or try a plain, unscented clumping litter if you've been using a specialty type. Many cats prefer straightforward clay-based clumping litter over premium or scented varieties.
If none of these changes help, or if scratching is paired with other signs of illness, schedule a vet visit. Bring a note of when the scratching started and what changes you've made to the litter or box—that information helps the vet narrow down whether the cause is behavioral, stress-related, or medical.
Frequently Asked Questions
Is it normal for cats to scratch the litter box?
Yes, scratching to bury waste is normal cat behavior. The problem is when scratching becomes excessive—lasting a minute or more, or happening every time your cat uses the box. Normal scratching is a quick swipe or two; excessive scratching suggests discomfort or stress.
Can changing litter brands cause scratching?
Yes, absolutely. Cats are sensitive to texture and smell. Even switching from one clumping litter to another can trigger excessive scratching if the new litter feels different. If you must change brands, mix the old and new litter gradually over a week so your cat adjusts.
How often should I scoop and replace litter?
Scoop at least once daily to remove clumped waste and urine. Replace all the litter completely at least once a week. If you have multiple cats or a cat that uses the box very frequently, scoop twice daily and change litter more often.
What if my cat scratches but doesn't cover waste?
This is different from excessive scratching and usually means your cat is marking territory or stressed. It can also signal a medical issue. If this behavior is new, contact your vet to rule out a urinary tract infection or other health problem.
Should I use a covered litter box?
Covered boxes can make some cats feel trapped and increase scratching. If your cat is scratching excessively and you're using a covered box, try switching to an open box. Many cats prefer the open style because it feels less confining.