Why Does My Cat Lay in the Litter Box?
A cat lying, sitting or even sleeping in the litter tray can happen for several reasons, ranging from harmless comfort-seeking to a genuine health concern. Cats are generally clean animals, so regularly lingering in a place they use for toileting is worth paying attention to.
If you are asking "why does my cat lay in the litter tray?", the most important question is whether this is a one-off behaviour or a sudden, repeated change. Occasional litter tray sitting may not be serious, especially in kittens, newly adopted cats or nervous cats. In this guide, we look at behavioural causes, medical causes and red flags, with references to peer-reviewed and UK veterinary sources listed at the end.
Is It Normal for Cats to Sleep or Lie in Their Litter Tray?
The litter tray is not the most typical resting place for a relaxed adult cat, but context matters. Kittens may fall asleep in the litter tray because they are still exploring their environment and may not yet understand the tray in the same way an adult cat does.
Similarly, a newly adopted cat may choose to hide there because it smells familiar or feels enclosed and safe. A clean, unused litter tray is less of an unusual resting place than a dirty tray, but if it keeps happening then it is worth monitoring.
The choice to lie in the litter tray becomes more concerning when it starts suddenly, happens often, or comes with signs of pain, urinary problems, illness or stress.
Most Common Reasons Cats Lay in the Litter Tray
There are several common explanations for cats choosing to lie down in their litter tray. Let's break them down one by one to help you assess which might apply to your cat.
Stress, Fear or Anxiety
Cats often retreat to enclosed, familiar or quiet places when they are stressed. There are several possible triggers, such as:
- Moving home
- A new pet
- A new baby
- Building work
- Loud noises
- Visitors
- Fireworks
- Conflict with another cat
Fear and anxiety are among the most common reasons for a cat spending time in its litter tray. We'd suggest providing other safe spaces for your cat and trying to minimise the impact of any changes in the home to help reduce stress.
Territorial Behaviour
In multi-cat homes, a cat may choose to guard the litter tray as an important resource in their territory. Cats often struggle to share resources well, and this type of behaviour may happen when there are too few trays, trays are placed too close together, or one cat is bullied away from the toileting area.
The AAFP-ISFM Feline Environmental Needs Guidelines recommend one litter tray per cat plus one extra, positioned so that no tray is visible from another.[1] This provisioning approach can help reduce territorial pressure around litter trays in multi-cat homes. Territorial urinary behaviour can also show up as spraying, which we cover in our guide on why neutered cats spray.
The Tray Feels Safe or Comfortable
A covered tray can feel like a hiding place to a nervous cat. The texture of the litter may feel soft, cool or familiar under the paws, and a lid may make the cat feel sheltered and protected.
This can be a sign that something in the home is making your cat uncomfortable. It isn't unusual for new cats, but otherwise it can be worth looking for the cause. The goal isn't to punish the behaviour but to understand what your cat is trying to tell you.
Pregnancy or Nesting
A pregnant cat may look for a quiet, enclosed place to rest or give birth. A litter tray with a lid, particularly one that is kept very clean, may feel like a good fit for this need.
If your cat is unneutered and could be pregnant, we'd suggest providing a clean nesting box away from the litter tray and contacting your vet for guidance. Our guide on cat pregnancy, signs and care covers this in more detail.
Ageing, Pain or Mobility Problems
Older cats may stay in the tray because they find it difficult to get in and out. Arthritis and other mobility issues are more common in senior cats than pet parents sometimes realise, and a high-sided tray can be uncomfortable or genuinely difficult to enter and exit.
Low-sided trays can make it easier for elderly cats or cats with mobility issues to use their tray comfortably. If pain seems to be involved, our guide on arched back in cats covers subtle signs of discomfort worth watching for.
When Lying in the Litter Tray Can Be a Medical Concern
In some cases, a cat may stay close to or inside the litter tray because they feel an urgent need to urinate or pass stool. Urinary issues can be very serious in cats, with possible causes including urinary tract infections, feline idiopathic cystitis, bladder stones or crystals, and urethral obstruction.[2]
Urinary tract problems can range from minor to genuinely life-threatening. If you notice any signs of urinary trouble, please contact a vet as soon as possible.
Digestive issues can also cause a cat to remain in or near the tray. Common ones include:
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- Constipation
- Diarrhoea
- Pain when passing faeces
Cats might remain in the tray because they feel like they still need to go, even if they have just been. Changes in the smell, colour or consistency of stools can also point to underlying issues. Our guide on what your cat's poop smell can tell you about their health covers this in more detail.
Cats are also very good at hiding signs of illness. Symptoms like lethargy, reduced appetite, hiding away, or weakness could all suggest something is wrong. We'd suggest against trying to diagnose a problem from behaviour alone. Observing patterns in eating, litter tray use and general behaviour, then contacting a vet when concerns arise, is the safer approach.
Emergency Signs to Watch For
The following signs point to a possible urgent problem. If you see any of these, please contact a vet immediately.
| Sign | Why it matters |
|---|---|
| Repeated trips to the litter tray with little or no urine | Possible urinary blockage or bladder problem |
| Straining to urinate | Can be confused with constipation but may be urinary |
| Crying, yowling or obvious distress in the tray | Suggests pain and possible emergency |
| Blood or pink/red staining in urine | Possible urinary tract issue |
| Excessive licking around the genitals | Common sign of urinary discomfort |
| Vomiting, weakness, collapse or severe lethargy | Could indicate a serious emergency |
| Swollen, tense or painful tummy | Needs urgent veterinary attention |
A urethral obstruction (a "blocked bladder") is a genuine emergency and is particularly common in male cats due to their narrower urethras.[3][2] Without treatment, a blocked cat can develop kidney failure and life-threatening complications within 24 to 48 hours.[2] If your cat is straining, producing little or no urine, or crying in the tray, please contact your vet or an emergency vet straight away.
What Should You Check Before Calling the Vet?
If you are unsure whether you need to call the vet, working through a short checklist can help. Here are the questions to consider:
- Has the behaviour started suddenly?
- Are there normal-sized urine clumps in the tray?
- Is the cat producing little or no urine?
- Is there blood in the litter?
- Is the cat straining, crying or licking around their genitals?
- Is the poo normal, hard, absent or runny?
- Is the cat lying in the tray once, or doing it repeatedly?
- Is the cat eating, drinking and moving normally?
- Has anything changed recently in the home?
If the answers point to normal urine and normal behaviour, and something in the home has recently changed, stress or nerves are more likely to be behind the behaviour. If any of the medical warning signs above are present, we'd suggest calling your vet. Taking a photo of the litter tray output and noting the times and frequency of tray use can help your vet make a more informed assessment.
How to Stop Your Cat Using the Litter Tray as a Bed
The right solution depends on what is behind the behaviour. If a health problem is likely, a vet visit is the priority. If the cause seems to be stress or setup issues, changes to the environment can often help.
Practical steps to consider:
- Add more trays, particularly in multi-cat homes, following the one-per-cat-plus-one rule[1]
- Place trays somewhere quiet, private and accessible
- Keep litter trays away from food, water and sleeping areas
- Avoid lining trays with newspaper or plastic liners, as these can put some cats off
- Choose unscented cat litter, as strong scents can be off-putting to cats. Our guide on what cat litter is made of covers the main types and their pros and cons
- Fill the tray to a depth of around 3 cm
- Scoop at least twice a day and give the tray a full clean at least once a week
- For older cats, choose low-sided trays and consider placing extra trays around the home for easier access
Offering better alternatives can also help. A covered cat bed, cardboard box, quiet room, a blanket with a familiar scent, or a cat tree can all provide safer resting spots than the litter tray.
What to Do in a Multi-Cat Household
In a multi-cat home, we'd suggest providing several trays in different locations, not lined up together. Cats often see multiple trays placed side by side as a single toileting area, rather than the separate resources they are meant to be.[1]
It can also be worth watching for subtle signs of bullying, which may not always be obvious. Signs include one cat blocking access to the tray, prolonged staring, chasing or waiting outside the tray. Each cat may also need separate access to food, water, beds, scratching posts and hiding spots.
Resource stress in multi-cat households has been linked to both toileting problems and urinary conditions in peer-reviewed veterinary research.[4]
How Litter Sense Can Support Early Detection
Because urinary changes can be one of the earliest signs of feline health problems, tracking what happens in the litter tray day-to-day can matter. Litter Sense monitors your cat's urine daily and changes colour if it detects an abnormal pH balance or the presence of blood, giving pet parents an early sign to book a vet appointment before problems progress.
Final Thoughts: Should You Worry If Your Cat Lays in the Litter Tray?
Occasional lying in the tray can be harmless behaviour, particularly for kittens and newly adopted cats. Sudden or repeated lying deserves more attention. Stress, territorial behaviour, pregnancy, ageing and litter tray setup can all play a role. Urinary issues can too, and these can move quickly, so we'd suggest treating any urinary red flag as urgent.
If your cat is straining, crying, passing little or no urine, showing blood in their urine, vomiting, hiding or seeming weak, please contact your vet straight away. Swift action tends to lead to better outcomes than a wait-and-see approach.
Frequently Asked Questions
Is it bad if my cat sleeps in the litter tray?
Occasional sleeping in the tray isn't always a problem, particularly for kittens or newly adopted cats. Repeated or sudden behaviour, especially alongside signs of illness or urinary trouble, is worth a vet check.
Why does my cat lie in the litter tray after I clean it?
A freshly cleaned tray may feel more comfortable, cool or safe to some cats. If the behaviour is occasional and the cat is otherwise well, it isn't usually a concern.
Should I move my cat out of the litter tray if I find them lying in it?
We'd suggest against punishing or startling the cat. Gently observe the behaviour, look for signs of stress or illness, and offer better resting alternatives like a quiet covered bed nearby.
Can pregnancy cause a cat to lie in the litter tray?
Yes. A pregnant cat may seek out enclosed, quiet places to nest. If you suspect your cat is pregnant, contact your vet and provide a proper nesting box away from the litter tray.
How urgent is a blocked bladder in a male cat?
Very urgent. A urethral obstruction is a life-threatening emergency, and untreated cases can lead to kidney failure and death within 24 to 48 hours.[2] If your male cat is straining, producing little or no urine, or crying in the tray, please contact your vet or an emergency vet immediately.
References
- Ellis SLH, Rodan I, Carney HC, et al. AAFP and ISFM Feline Environmental Needs Guidelines. Journal of Feline Medicine and Surgery. 2013;15(3):219-230. Available at: https://catvets.com/guidelines/practice-guidelines/environmental-needs-guidelines
- University of Illinois College of Veterinary Medicine. Blocked Cats: An Emergency for Male Cats. Available at: https://vetmed.illinois.edu/pet-health-columns/blocked-cats-an-emergency-for-male-cats/
- O'Neill DG, Gostelow R, Church DB, Brodbelt DC. Occurrence and clinical management of urethral obstruction in male cats under primary veterinary care in the United Kingdom in 2016. Journal of Feline Medicine and Surgery. 2022. PMC 8965234. Available at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8965234/
- Kim Y, Kim H, Pfeiffer D, Brodbelt D. Epidemiological study of feline idiopathic cystitis and urinary problems in Australian cats. Journal of Feline Medicine and Surgery. 2020. PMC 10814394. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC10814394
- International Cat Care. Litter and litter trays. Available at: https://icatcare.org/articles/litter-and-litter-trays
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