Skip to main content
ReviewCatLitter
Box Refusal

Cat Stopped Using the Box After a Litter Change

Put the old litter back today. Not tomorrow, not after one more try. Every day your cat goes somewhere else, that spot gets more normal, and a habit is far harder to undo than a bag of litter is to replace.

9 min read•Updated Aug 22, 2026

Read this before the rest

A litter change is a convenient explanation, and sometimes it is the wrong one. Call a vet the same day if your cat is straining, crying in the box, going in and out repeatedly, leaving tiny puddles, or if there is any blood.

A blocked male cat is an emergency measured in hours. Nothing on this page is worth a delay.

The reset, in order

Today

Put the old litter back

Empty the box and refill it with the litter your cat was using before. Do not mix. You are trying to get one clean, boring success as fast as possible.

Today

Clean every accident properly

An enzyme cleaner made for pet urine, not a household spray. Anything ammonia-based smells like a toilet to a cat and marks the spot as approved.

Day 1 to 3

Add a second box

Different room, same old litter. Two easy options beat one perfect one while confidence is coming back.

Day 3 to 7

Change nothing else

No new box, no new location, no new cleaner, no cover. One variable at a time or you will never know what worked.

After a week of clean use

Try again at a quarter strength

Only if you still want the new litter. Go slower than last time, and stop at the first hesitation instead of the first accident.

What the behaviour people say to change

Two things come up again and again, and neither costs anything. ASPCA says most cats prefer clumping, unscented litter with a medium to fine texture, and that most cats like a shallow bed, one to two inches rather than three to four.

ASPCA adds the other half: one box per cat plus one spare, scooped at least once a day. If your household is a box short, fixing that is a bigger lever than any brand on the shelf.

Unscented clumping litters we have tested

If you need somewhere safe to land, these match the profile the behaviour advice describes: no added fragrance, and clumps that hold together when lifted. Ordered by how many clumps came through our drop test whole.

Things that look like a fix and are not

  • Scented cleaner on the accident spot. It masks the smell for you and leaves the marker for your cat. Use an enzyme cleaner.
  • Putting a lid on the box. A cover traps smell inside for the animal that has to sit in it.
  • Moving the box somewhere quieter. Sound idea in general, terrible timing now. Change one thing at a time.
  • Punishment of any kind. It teaches your cat to go where you cannot see, which is worse for both of you.
ReviewCatLitter editorial teamUpdated Aug 22, 2026

Behaviour advice on this page is sourced to the ASPCA, linked above, and is general information rather than veterinary diagnosis. Product notes come from our own bought-and-tested reviews.

Editorial standardsTesting methodology

Questions people ask

My cat stopped using the litter box right after I changed brands. What now?
Put the old litter back today, then call a vet if there is any straining, blood, or repeated tiny puddles. Once a medical cause is ruled out, run a week of clean use on the old litter before you try the new one again.
How long does it take a cat to accept a new litter?
A week of gradual mixing suits most cats. A cat that has already refused once needs longer, usually two weeks of stepped mixing with an old-litter box available the whole time.
Is it the smell or the texture?
Texture, more often than not. Grain size is what your cat feels on its paws every visit. Fragrance is the other common culprit, and the ASPCA is direct about it: use unscented litter.
Should I go back permanently?
If two careful attempts fail, yes. A litter your cat will not use is not cheaper, quieter or cleaner than the one it will, whatever the reviews say.

Related reading