The most common reasons cats stop using the litter box
A cat that poops outside the litter box is usually telling you something is wrong—either with the box itself, where it sits, or with the cat's health. The problem is rarely that your cat is being stubborn or spiteful. Most cats naturally want to use a litter box; when they stop, something has changed in a way that matters to them.
The most frequent culprits are a box that is too dirty, placed in a spot the cat no longer feels safe using, or one that has been moved or changed. Medical problems—especially digestive issues, parasites, or pain—are the second major category. Less often, the box itself is the problem: wrong size, wrong litter type, or a covered box that traps odor or makes the cat feel trapped.
Start by ruling out health issues first, because a cat in pain or with diarrhea will often avoid the box even if nothing else has changed. Then work through the box and placement issues in order. Most cats will return to the box once you fix the actual problem.
Key Takeaways
- A veterinary exam should be your first step, because digestive problems, parasites, and pain are common reasons cats avoid the box.
- Litter box cleanliness matters more than most owners realize—many cats will not use a box that has been used more than once or twice without scooping.
- The location of the box can change in importance as your cat ages or as your household changes; a box that worked for years may stop working if it becomes harder to reach or less private.
- The type of litter, the depth of litter, and whether the box is covered all affect whether a cat will use it, and preferences vary widely between individual cats.
- Once you identify and fix the problem, it usually takes a few days to a week for your cat to reliably return to the box.
Rule out medical problems first
Before you change anything about the litter box setup, take your cat to a veterinarian. Digestive issues, intestinal parasites, food sensitivities, and inflammatory bowel disease all cause cats to avoid the box or have accidents outside it. Pain from arthritis, anal gland problems, or other conditions can also make a cat reluctant to use the box, especially if it requires climbing into a high-sided box or jumping up to reach it.
Your vet can run a fecal exam to check for parasites and ask questions about your cat's diet, water intake, and the consistency and frequency of stools. If your cat has recently changed food, that alone can cause temporary digestive upset. Once medical issues are ruled out or treated, you can move on to the box and environment.
Check how often the box is being scooped
Many cats will not use a litter box that has been used more than once or twice without being scooped. This is not a preference—it is how cats are wired. In the wild, cats bury their waste to avoid attracting predators, and a box full of old waste feels unsafe and unclean to them, even if you cannot smell it yet.
Scoop the box at least once daily, ideally twice if you have more than one cat. If you have been scooping less often, increase the frequency and watch whether your cat returns to the box within a few days. For households with multiple cats, the rule of thumb is one box per cat, plus one extra—so two cats need three boxes. Cats often will not share a box, and a cat may avoid a box if another cat has just used it.
Evaluate the box location and accessibility
A litter box that was fine for years can suddenly become a problem if your cat's mobility changes, if the household layout changes, or if the box becomes less private. An older cat with arthritis may stop using a box that requires jumping or climbing. A box in a noisy laundry room may feel unsafe if you recently added a loud appliance. A box that was private when it sat in a corner may feel exposed if you rearranged furniture.
Move the box to a quiet, low-traffic area where your cat can see approaching people or animals. Avoid placing it near the food and water bowls—cats naturally do not want to eliminate near where they eat. If your cat is older or has mobility issues, place the box on the same floor where your cat spends most of its time and make sure the sides are low enough that the cat can enter and exit without strain.
If you have recently moved the box, move it back to where it was, or move it very gradually—just a few inches every few days—so your cat can find it. A sudden location change can cause a cat to forget where the box is or to feel unsafe in the new spot.
Assess the litter type and box setup
Some cats are particular about litter texture, and a change in brand or type can cause them to stop using the box. If you have recently switched litter, try switching back. If you have always used the same litter and your cat has suddenly stopped using the box, the litter itself may not be the issue—but it is worth testing by setting out a second box with a different litter type to see if your cat prefers it.
The depth of litter also matters. Most cats prefer 2 to 3 inches of litter. Too little and they cannot bury their waste; too much and they may feel like they are sinking. If your box has a cover or hood, try removing it. Covered boxes trap odor and can make a cat feel cornered, especially if another cat is nearby. Some cats straightforward prefer an open box.
The size of the box itself should be at least 1.5 times the length of your cat's body. A box that is too small will cause a cat to avoid it or to hang over the edge while using it. If you have a large cat or a senior cat with mobility issues, a storage container or a large plastic under-bed box can work better than a standard litter box.
Set up a second box to identify preferences
If you are not sure what the problem is, set up a second litter box in a different location with different litter. This gives your cat options and helps you figure out what it prefers. If your cat uses the new box and ignores the old one, you have learned something about location, litter type, or box style. If your cat uses both equally, the problem may be cleanliness or frequency of scooping.
Keep the second box in place for at least a week while you observe which one your cat uses and when. Once you have identified the preference, you can adjust the original box to match or replace it entirely.
Clean accidents thoroughly to prevent repeat use
If your cat has already pooped outside the box, clean the area thoroughly with an enzymatic cleaner designed for pet urine and feces. Regular household cleaners do not break down the scent markers that tell your cat "this is a good place to go." Cats are drawn back to spots where they have eliminated before, so if you do not remove the scent completely, your cat may keep using that spot.
Soak the area with enzymatic cleaner, let it sit for the time recommended on the bottle, and then blot it up. Do this even if you cannot smell anything—your cat can smell it, and that is what matters. Once the area is clean, block your cat's access to that spot if possible, or place a litter box directly over it temporarily to redirect the behavior.
Frequently Asked Questions
How long does it take for a cat to start using the litter box again after I fix the problem?
Most cats return to the box within a few days to a week once the underlying issue is resolved. If you have cleaned up accidents thoroughly and the box is now clean, accessible, and in a safe location, your cat should resume normal behavior quickly. If it takes longer than two weeks, there may be another issue you have not identified yet.
Should I punish my cat for pooping outside the box?
No. Punishment will not teach your cat to use the box and will only make your cat afraid of you or more stressed. Cats do not eliminate outside the box out of spite or to punish you—they do it because something is wrong. Focus on finding and fixing the problem instead.
Can stress or anxiety cause a cat to stop using the litter box?
Yes. Changes in the household, new pets, loud noises, or moving can all stress a cat enough to cause litter box avoidance. If you have recently had a major change and ruled out medical issues, try placing the box in a very quiet, find spot and consider using a pheromone diffuser designed for cats to help reduce anxiety.
What if my cat poops in the box but pees outside it?
This is often a separate issue from fecal avoidance and is usually related to the box location, cleanliness, or the cat's feelings about the box itself. Some cats will use the box for one type of waste but not the other. Follow the same troubleshooting steps—check with a vet first, then adjust cleanliness, location, and box type—but know that you may need to set up a separate box specifically for urination.
Is it normal for an older cat to stop using the litter box?
Not normal, but common. Older cats often develop arthritis, cognitive changes, or medical conditions that affect their ability or willingness to use the box. A vet exam is especially important for senior cats. You may also need to provide a box with lower sides, place boxes on multiple floors, or scoop more frequently as your cat ages.