Cats scratch the litter box sides to mark territory and manage litter depth
When your cat scratches at the walls or rim of the litter box instead of just digging in the litter, she is doing two things at once: marking the box as hers and adjusting how much litter covers her waste. Cats have scent glands in their paws, so scratching leaves a chemical signal that says "this is mine." At the same time, she is testing the litter level and pushing it around to create the depth she prefers for burying.
This behavior is normal and instinctive. In the wild, cats dig shallow holes, do their business, and cover their waste to hide it from predators and competitors. The scratching at the sides is part of that same sequence—she is not frustrated or sick, she is just being a cat. Most cats do this occasionally, and it does not mean anything is wrong with the box or her health.
Key Takeaways
- Scratching the litter box sides is a normal territorial and litter-management behavior, not a sign of illness or distress.
- Cats scratch to leave scent marks from glands in their paws and to adjust litter depth to their preference.
- Excessive scratching or scratching outside the box can signal that the litter type, box size, or cleanliness needs adjustment.
- A box that is too small, litter that is too shallow, or a box that is not cleaned daily may trigger more frequent scratching.
- Some cats scratch more after using the box; others scratch before—both patterns are typical.
How litter depth affects scratching behavior
Cats have a preferred litter depth, usually between 2 and 3 inches. If the litter is too shallow, your cat will scratch more at the sides and bottom to try to create a deeper hole. If it is too deep, she may scratch at the walls to push litter out and make the layer thinner. By adjusting the amount of litter you put in the box, you can often reduce the amount of scratching and mess.
Pay attention to how much litter your cat leaves behind after she uses the box. If she is leaving large bare patches or if the litter is compacted into a hard layer, add more litter at the next cleaning. If litter is spilling out onto the floor around the box, reduce the amount slightly. Most cats settle into a routine once the depth matches what they want.
Box size and scratching intensity
A litter box that is too small forces your cat to scratch at the sides because she does not have enough room to dig forward and back. The rule of thumb is that the box should be at least one and a half times the length of your cat's body. If your cat is scratching hard at the walls or if her rear end hangs over the edge when she is in the box, the box is too small.
Switching to a larger box—or even a storage container with a hole cut in the lid—often stops the aggressive side-scratching within a few days. Some cats prefer boxes with higher sides, which also gives them more surface to scratch if they need to. If you have multiple cats, each one should have her own box plus one extra, so competition for space does not trigger more scratching.
Cleanliness and how often you should scoop
A dirty litter box makes cats scratch more, both at the sides and at the litter itself. Urine and feces break down the litter and create a compacted, unpleasant surface. When your cat steps into that, she scratches harder to try to find clean litter underneath or to bury the mess more completely. Scooping once or twice a day prevents this buildup.
If you scoop daily and your cat is still scratching heavily, the litter may be clumping poorly or breaking down too fast. Some litters hold up better than others—clay-based clumping litters generally last longer than non-clumping types. If you switch litter brands, your cat may scratch more for a few days while she adjusts to the new texture and smell.
When scratching signals a problem with the litter itself
Some cats scratch more when the litter type changes or when they dislike the texture. Cats can be particular about whether they prefer fine-grain, medium, or coarse litter. If you recently switched brands or types and your cat started scratching more, try going back to the old litter for a week. If the scratching stops, you have found the issue.
Scented litters and litters with added deodorizers can also trigger more scratching in sensitive cats. The smell or texture irritates their paws, so they scratch to try to clear it away. If your cat has always scratched a lot, experiment with unscented, fine-grain clay or paper-based litters to see if that reduces the behavior. Keep the old litter available during the switch so she can choose.
Scratching before versus after using the box
Some cats scratch at the sides before they use the box, as if preparing the space. Others scratch after, as part of covering their waste. Both patterns are normal. Pre-scratching usually means your cat is testing the litter depth and making sure the box feels right. Post-scratching is the covering instinct—she is finishing the job of hiding her waste.
If your cat scratches both before and after, or if she scratches for a long time, she may straightforward be thorough or anxious about her waste being exposed. This is not a problem unless the scratching is so vigorous that litter flies all over the floor. In that case, a box with higher sides or a litter mat underneath will contain the mess without changing her natural behavior.
Litter box placement and territorial scratching
Cats also scratch the sides of the box more when they feel the need to mark territory—usually when there are other cats in the house or when they sense a threat. If you have multiple cats and one is scratching the box intensely, she may be claiming it as hers. Providing separate boxes in different locations reduces this competition and the scratching that comes with it.
The location of the box matters too. If the box is in a high-traffic area or near a window where your cat can see outdoor cats, she may scratch more to reinforce her claim. Moving the box to a quieter, more private spot can reduce territorial scratching. Some cats also scratch more if the box is near their food or water, because they want to keep that area separate from their toilet.
Frequently Asked Questions
Is it normal for cats to scratch the litter box every time they use it?
Yes, most cats scratch the litter box at least some of the time. It is part of their instinct to bury waste and mark territory. If your cat scratches every single time and the behavior is new, check the litter depth and box cleanliness first. If those are fine, she may just be a thorough cat.
Why does my cat scratch the litter box but not cover her waste?
She may be scratching to mark territory or adjust the litter, but not actually burying her waste because the litter is too shallow, the box is too small, or she is not feeling well. Try adding more litter or switching to a larger box. If the behavior continues for more than a week, a vet visit can rule out medical issues.
Can litter box scratching mean my cat is stressed?
Excessive scratching can be a sign of stress, especially if it is new behavior or if your cat is also avoiding the box or going outside it. Changes in the home, new pets, or a dirty box can all trigger stress-related scratching. Check the basics first—cleanliness, size, and litter type—then consider whether anything in your cat's environment has changed recently.
Does the type of litter box material affect scratching?
Yes. Plastic boxes with smooth sides may feel different under a cat's paws than cardboard or ceramic, which can change how much she scratches. Some cats also scratch less in boxes with higher sides because they feel more enclosed. If your cat scratches heavily, try a box with taller walls or a different material to see if that helps.
Should I stop my cat from scratching the litter box?
No. Scratching is a normal, healthy behavior. If the scratching is flinging litter everywhere, use a litter mat or a box with higher sides to contain the mess. If she is scratching outside the box or avoiding it, that is when you should investigate the box size, litter type, or cleanliness.