4 Min ReadYou buy the litter, pick a spot, and figure that's the job done. Most cat parents do. But litter box problems are one of the most common issues vets and cat behaviourists see, and some of them come down to a handful of fixable setup mistakes.
When cats start going outside the box, it is often a sign that something about their setup, routine, or health needs attention. The good news is that most litter box issues can be improved with a few simple changes. Here's what's going wrong, and how to put it right.
Key Takeaways:
- Cats are particular about litter type, box size, and cleanliness. Small things make a big difference
- The "one box per cat, plus one" rule exists for good reason
- A sudden change in litter box habits is often a health signal, not a personality trait
- Placement and scent are the two most overlooked factors
Using the Wrong Type of Litter
Strongly scented litters are designed for human preference, not cats. Because cats have a highly sensitive sense of smell, fragrances can be overwhelming, leading them to avoid the box entirely.
Texture matters too. Some cats are very particular about how litter feels under their paws, and a brand switch alone can be enough to send them looking for an alternative spot. If you're troubleshooting avoidance, unscented, fine-grained clumping litter is the safest starting point. Introduce any new cat litter gradually by blending it with the existing type over a week or two.
Cats with sensitivities or allergies can also react to certain litter ingredients. If you notice sneezing, wheezing, coughing, paw-licking, or skin irritation after using the litter box, it's worth a chat with your vet.
Not Cleaning Often Enough
Cats are naturally clean animals and will often refuse to use a soiled box. Scoop at least twice daily, use a gentle enzymatic urine cleaner in the litter box, perform a full litter change when necessary, and consider using a stainless steel box to avoid plastic trapping odours.
If there's been an accident outside the box, cleaning the surface isn't enough. Cats can still smell where they've been, even after the visible mess is gone, and they're likely to return to the same spot. You need something that breaks down urine odour at a molecular level rather than just masking it.
Cat pee spray uses natural odour-neutralising enzymes with no harsh chemicals to deal with exactly this. It works on surfaces, soft furnishings, and it can be used in the litter box as well.
The Box is Too Small
A litter box should be large enough to allow your cat to move around, dig, and cover without feeling restricted. Most standard litter boxes sold at the supermarket are too small for an adult cat.
Bigger is almost always better. And while covered boxes look tidy, many cats dislike them. Covered boxes can trap odours and create a dark, enclosed space with only one exit, which can feel unsafe for some cats during a vulnerable moment.
Poor Placement
Cats prefer a quiet, private, and easily accessible place. Avoid spots near loud appliances like washing machines, or anywhere another pet could corner them mid-business. Avoid placing the box next to food and water bowls, too. Cats instinctively won't eliminate near where they eat.
Think about where your cat already chooses to rest or hide. That's the kind of calm, low-traffic environment they need for the litter box.
Place their spare litter box in a separate area of the home so your cat always has another option available.
If your cat is repeatedly urinating in a location outside their litter box, try placing the box in that location instead.
Not Enough Boxes in a Multi-Cat Home
The rule is one litter box per cat, plus one extra. Two cats mean at least three boxes. Some cats prefer to urinate in one and defecate in another; others simply won't share with a housemate.
Multi-cat households are also where litter box bullying happens. If one cat is picking on another, the litter box is a classic ambush spot, especially if it's covered or has only one way in. The victim cat learns to avoid it altogether.
Spread boxes across different areas of the home. Clustering them together defeats the purpose.
Ignoring Changes in Habit
Cats don't eliminate outside the box to be difficult. They're communicating discomfort, fear, or illness.
Straining, blood in the urine, crying in the box, going more or less frequently, or a sudden shift to going elsewhere are all worth taking seriously. Urinary disease can escalate quickly, especially in male cats, so changes in litter box behaviour should never be dismissed as stubbornness. Always rule out a medical cause before adjusting the setup.
If your cat has had an accident on their coat or paws, cat wipes are a gentle, natural option for a quick clean-up.
Quick Tips Worth Knowing
- Keep 5–7 cm of litter in the box. Too little means poor coverage; too much goes everywhere
- Kittens, older cats, or those with arthritis need lower-sided boxes for easy entry
- If you're switching litter types, do it slowly. A cold-turkey switch is one of the most common triggers for avoidance
Getting litter box setup right isn't complicated, but it does take a little thought. Most mistakes are easy to fix once you know what to look for, and starting with the right cat litter makes everything easier.
CAT by Dr Lisa's litter is Australian-made from Australian oats. It’s plant-based, 100% biodegradable, and free from the ingredients that commonly cause problems. And like everything in the CAT by Dr Lisa range, it was created by Dr Lisa Chimes, a clinical veterinarian. Browse the full B-Corp Certified CAT by Dr Lisa range to find what works for your cat.
