Weeing outside the litter tray can be a urinary problem (like cystitis): check with your vet first.
Puddle or spray? The answer changes everything you should do next.
Free · 6 quick questions · not a diagnosis
Puddle or spray? The answer changes everything you should do next.
If you've scrubbed the carpet, washed the duvet again, moved the tray, changed the litter and plugged in a diffuser, and you're still finding wee, you haven't failed. And your cat isn't doing it to spite you.
Most advice treats "weeing outside the tray" as one problem. Vet guidelines don't. The first thing they work out is whether it's a puddle (going to the toilet in the wrong place) or a spray (leaving a message). The two need completely different fixes, which is why a product that works for one can make no difference to the other.
Answer 6 quick questions about what you've seen.
- Your cat's probable type: puddle, spray or a mix of both
- Your most likely starting point, out of 5 causes
- Why what you've tried so far may not have worked
- A clear "see your vet" warning if anything you tick needs a vet first
- Built on international vet guidelines and published studies (all sources listed)
Free · about 2 minutes · no sign-up needed. Not a diagnosis and not a replacement for your vet: it shows you the most likely place to start.
Where do you find it most often?
It's one of the biggest clues. Vet guidelines note that marks on upright surfaces (walls, doors, curtains) usually mean spraying.
Have you ever caught your cat in the act?
Why we ask: posture is one of the clues vets use. But a University of Lincoln study found no single sign is enough on its own, so we combine all your answers.
Have you noticed any of these?
This is the most important question. Pick the first one that fits.
How many cats and litter trays are in your home?
Why we ask: international vet guidelines recommend one tray per cat, plus one, in separate places.
Which of these is closest to your tray set-up?
Why we ask: in a 2017 study cats preferred clean trays, and vet guidelines advise open trays with unscented litter. Pick the closest.
Last one: what's going on at home?
Why we ask: a University of Lincoln study linked cat flaps and free outdoor access to more marking.
🔴 Phone your vet now
What you've ticked can be a sign of a blocked bladder. This is an emergency, especially in male cats, and it can't wait until morning. If your vet is closed, ring their out-of-hours number or the nearest emergency vet now.
Don't wait to see if it gets better, and don't try a home remedy first.
Why we're so firm: the UK vet charity PDSA advises contacting your vet immediately if a cat is struggling to wee and seems distressed, and describes a blocked bladder as an emergency.
Your result
Most likely: a puddle, not a spray
Your cat seems to be going to the toilet in the wrong place, not leaving a message. That's actually good news: it usually means something about the tray, the spot, the household or the body is putting them off the tray, and those are things you can change.
Why what you've tried may not have worked: calming plug-ins and stronger cleaners don't touch the reason a cat goes off its tray. If the real problem is the tray itself, the spot, or a niggle in the body, the shelf products miss it, however much you spend.
Most likely: a spray, not a toilet problem
Your cat seems to be leaving a scent message, not "missing the tray". Spraying is normal cat behaviour that has ended up in the wrong place, usually because something makes your cat feel their territory is under pressure.
Why what you've tried may not have worked: more trays, a new litter or a bigger box are fixes for a toilet problem. A spraying cat isn't looking for a toilet, so tray changes on their own rarely make a difference. What helps is working out what your cat feels they need to defend.
It could be either, or both
Your answers point both ways, and that's more common than you'd think. Some cats do both, and research shows no single sign reliably tells them apart.
Why what you've tried may not have worked: if two things are going on, a fix for one leaves the other untouched, so it looks as if "nothing works". Your plan starts with the most likely cause, and a simple tracker makes the picture clearer within the first week.
Plan A · Body first
Something in the body may be making the tray hard or uncomfortable to use: think sore joints, a sensitive bladder or something that makes them drink more. Your plan starts with the right questions for your vet, plus small, safe changes at home in the meantime (like a low-entry tray and a night light).
Your first 3 days on this plan:
- Day 1 · Phone your vet with the right questions (and whether they want a urine sample). Start your tracker.
- Day 2 · Add an easy, low-entry tray where your cat rests.
- Day 3 · Clean every known spot the way vet guidance recommends.
- Days 4–21, the cleaning method and your tracker are in your full plan.
Plan B · The toilet itself
The size, number, litter, cleanliness or place of the trays may not be working for your cat. In one study, adult cats preferred a big tray (86 × 39 cm) to a smaller one. This is often the quickest place to see a change, and the plan works in a small flat too.
Your first 3 days on this plan:
- Day 1 · Count your trays against what vet guidelines recommend. Start your tracker.
- Day 2 · Measure your cat: the tray size cats preferred in a study, and a cheap way to get it.
- Day 3 · The litter switch, done so your cat chooses it.
- Days 4–21, the cleaning method and your tracker are in your full plan.
Plan C · Household stress and cat tension
Tension between cats, or changes at home, may be making the toilet feel unsafe. Cats are experts at quiet bullying: a stare across the hallway can be enough to keep another cat away from the tray. Your plan focuses on safe, separate resources and calm routines.
Your first 3 days on this plan:
- Day 1 · Draw a 2-minute map of where your cats meet, eat and toilet. Start your tracker.
- Day 2 · Find the hidden "friendship groups" in your home.
- Day 3 · Give each group its own toilet, food and water, so nobody has to pass the other.
- Days 4–21, the cleaning method and your tracker are in your full plan.
Plan D · Territory messages
Your cat may be marking, often because of the neighbour's cat at the window, a cat flap, new things or changes at home. A University of Lincoln study linked cat flaps and free outdoor access to more marking. Your plan focuses on what your cat feels they need to defend.
Your first 3 days on this plan:
- Day 1 · The first question vets ask about a spraying cat. Start your tracker.
- Day 2 · The UV hunt: find every mark and what their position tells you.
- Day 3 · Clean round 1, so the marks stop "talking".
- Days 4–21, the window and cat-flap steps, the cleaning method and your tracker are in your full plan.
Plan E · The spot has become the toilet
Your cat may now prefer a particular place or surface (very often your bed or a soft rug) and traces of old wee you can't smell keep pulling them back. Some cleaners even make it worse: ammonia smells like wee to a cat. Your plan focuses on the spot, the smell and a better alternative.
Your first 3 days on this plan:
- Day 1 · Switch your cleaning: the products that pull cats back to the same spot. Start your tracker.
- Day 2 · The UV hunt: find the old spots you can't see or smell.
- Day 3 · The tray-at-the-spot trick vet guidelines recommend.
- Days 4–21, how to give the spot a new meaning, the cleaning method and your tracker are in your full plan.
Want a copy of your result?
We'll email it to you so you can find it again later or show it to someone at home. Just your result, nothing else.
Sent! Check your inbox.
You now know what's most likely going on. Your plan shows you exactly what to do about it.
The free check gives you the direction. The Cat & Tray Check + 21-Day Plan gives you every step: tonight's 3 actions, then one small step a day for 21 days, starting with your cat's most likely cause, plus the 4 other plans if your tracker says to switch at day 7 or 14. Built on international vet guidelines (AAFP & ISFM) and peer-reviewed studies, with every source listed.
- Your plan, day by day (21 days, about 5–10 minutes a day), plus all 4 other plans
- The full 14-question check to confirm your result, with the vet warning boxes
- The cleaning method from veterinary guidance, so old spots stop calling your cat back
- The tracker: day 7 and day 14 tell you whether to stay or switch
- What to say at home, for a partner or family who've run out of patience
- Instant download · one payment of £24, no subscription
For comparison: a plug-in diffuser starter kit costs around £17–£33 in UK shops, then refills every month. This is one payment, VAT included, instant download.
30-day money-back guarantee
Follow your plan for 30 days. If it isn't for you, for any reason, email us and we'll refund every penny. No forms, no questions.