How to Transition Your Cat to an Automatic Litter Box, Step by Step

Many cats switch to a self-cleaning litter box without much fuss. Some need patience, and rushing the switch is an easy way to end up with a cat that refuses the new box. The goal is simple: make the new box feel like the old one before it starts moving.

Here’s a step-by-step plan built from WIRED’s setup advice, the American Association of Feline Practitioners’ (AAFP) litter box guidance and what makers say about their own boxes. We haven’t tested these boxes ourselves, and where a test result appears, we name the outlet. This isn’t veterinary advice. If your cat stops using its box or its habits change, talk to your vet.

Before you start: is the box right for your cat?

A cat that can’t fit or isn’t heavy enough for the sensors won’t transition well, no matter how slowly you go. Check three things first:

• Weight and age. Most boxes have a minimum cat weight for automatic mode, usually 2.2–3.3 lb, and some a 6-month minimum age. See the kittens guide or run the cat safety checker.
• Size. A big cat in a small entry may refuse the box. WIRED’s 17-lb cat found the PuraMax 2 cramped but used the Purobot Max Pro 2 easily. Add your cat’s length to the checker for a size check.
• Litter. If your cat is attached to a litter the new box can’t use, expect a harder switch. The ScoopFree crystal boxes take only PetSafe’s crystal trays, for example.

The step-by-step plan

Step 1: Put the new box next to the old one

WIRED’s advice is to place the new box near the old one. Your cat already goes to that spot, so you’re changing one thing at a time.

Pick a spot that also works long-term. The AAFP’s client guide says to avoid busy areas. A quiet corner your cat can reach without passing a noisy appliance or another pet is ideal. Use a hard, level floor: cats.com’s tester found carpet made the PuraMax 2’s weight sensor inaccurate.

If you later want the new box somewhere else, move it once your cat is using it reliably, not during the switch.

Step 2: Keep the old box

Don’t remove the old box on day one. WIRED says to keep it until your cat uses the new one regularly.

The vet guidance points the same way. The AAFP and the MSD Veterinary Manual both recommend at least one more litter box than the number of cats. Many owners keep a manual box permanently as the “plus one,” which also covers power cuts and breakdowns. See how many litter boxes per cat.

Step 3: Use familiar litter, and add some used litter

Fill the new box with the litter your cat already uses, as long as the box accepts it. Then add a scoop of used litter from the old box. WIRED says litter attractant and old litter help.

Check the maker’s litter rules first. Whisker recommends clumping clay for the Litter-Robot 4 and warns that translucent or white litter can affect its level sensing. PETKIT says the Purobot Max Pro 2 needs granules under 0.5 in. Our litter guide lists what works in each box.

The AAFP’s client guide says most cats prefer soft, unscented clumping litter, and many dislike aromatic litters, deodorizers and box liners. During the switch, leave out optional scented add-ons and keep the box smelling as neutral as possible.

Step 4: Run it with automatic cleaning off

Let your cat explore and use the box before it ever moves. A cycle starting while your cat is sniffing the entry can set the whole process back. Ways to do this:

• Litter-Robot 4, 5 and EVO: Whisker’s semi-automatic routine for small kittens is to leave the unit powered off and start cycles yourself. The same approach works for a nervous adult.
• PETKIT PuraMax 2: the Amazon listing describes automatic, scheduled and manual modes. Use manual.
• Neakasa M1: Kitten Mode turns automatic cleaning off.
• Others: use the app’s off or manual setting, or unplug it, and scoop by hand.

Scoop or cycle it yourself at least daily, as the AAFP recommends for any box, and only cycle when your cat is out of the room.

Step 5: Turn on automatic cleaning, gently

Once your cat is using the new box regularly, switch on automatic cleaning:

• Start with the longest delay the app offers, so the cycle runs well after your cat has left. The Lesure app has an adjustable delay. The Crystal Smart’s rake starts about 20 minutes after each visit.
• Use schedules or do-not-disturb. WIRED suggests them. Avoid cycles during your cat’s usual box times, such as right after meals.
• Be home for the first few cycles. Watch how your cat reacts to the sound and movement.

Step 6: Retire the old box, or keep it

When your cat has used the new box reliably for a while with automatic cleaning on, you can move the old box farther away or to another floor. If you have more than one cat or more than one floor, the vet rule says keep it. If you have one cat on one floor, we’d still keep a manual backup.

What the numbers say about acceptance

Whisker says over 95% of cats acclimate to the Litter-Robot 4. It bases that figure on return reasons, so treat it as the maker’s claim rather than an independent study.

Independent tests show preferences vary. In Tom’s Guide’s test of four boxes, its cats used the open-top Neakasa M1 51 times in one week, the Litter-Robot 4 30 times, and the Leo’s Loo Too, with the smallest opening, about a third as often as the LR4. WIRED reported that its cats took to the Lesure, the Litter-Robot EVO and the ELS PET Orbitie quickly.

The MSD Veterinary Manual notes that some cats prefer hooded boxes, and that offering different types can help. If your cat avoids hooded boxes, an open-top model may be the easier switch. Check the Neakasa M1 price or the Lesure.

Signs the transition isn’t working

• Your cat only uses the old box after a week or two of the new one sitting beside it with familiar litter.
• Your cat sniffs or enters, then leaves without using it. The entry may be too small or the litter unfamiliar.
• Your cat bolts when a cycle starts, or avoids the area afterward. Noise can matter: cats.com found the Furbulous very loud at first.
• Your cat goes beside the box, or anywhere outside a box.

What to try

1. Go back to automatic cleaning off and give it more time.
2. Increase the delay, or schedule cycles only for when your cat is elsewhere.
3. Add more used litter, and make sure the box uses the litter your cat prefers.
4. Check the fit. Use the cat safety checker with your cat’s length.
5. Rule out a fault. Phantom cycles and ghost-cat errors happen; see troubleshooting.
6. Check the return window. Amazon’s Litter-Robot listing mentions a 90-day in-home trial from Whisker, and WIRED says ELS PET offers a 90-day money-back guarantee.

When to see a vet

House-soiling isn’t always about the box. The AAFP and ISFM publish guidelines to help vets diagnose house-soiling, and those guidelines look at the cat’s health and environment as well as the litter box. A cat that pees outside the box during a transition might be reacting to the new box, or it might have a medical problem that happened to start at the same time.

Call your vet if your cat:

• Goes outside the box, even with the old box still available
• Strains, goes more or less often than usual, or you see blood
• Changes its litter box habits suddenly
• Seems unwell in any other way

If your box has an app that logs visits or weight, those records can be useful to show your vet. Just remember that weight-based cat ID can mix up cats of similar weight, so check the data is for the right cat.

Bottom line

Put the new box beside the old one, fill it with familiar litter plus a scoop of used litter, run it with automatic cleaning off, and turn it on with a long delay once your cat is using it. Keep the old box until the new one is a habit, and keep at least one manual box for good. If your cat goes outside the box at any point, talk to your vet. When you’re ready to choose, compare every model on the litter box chart, and find litter, liners and mats on our accessories page.