I've spent five years testing automatic litter boxes with Mao, Leo, and Deo in a three-cat home. Covered vs. uncovered comes up constantly in the buying questions I get. The honest answer: there's no universal preference. Research on 28 cats found 70% showed no preference at all. Of the cats that did care, they split evenly between covered and uncovered. What actually matters is whether your specific cat is the kind of cat that will be stressed or uncomfortable in an enclosed space. You can often predict this before you buy.
The Short Answer
Most cats are indifferent to whether a litter box has a cover. A 2012 study from Ross University (published in the Journal of Feline Medicine and Surgery) tracked 28 cats given equal access to both open and covered boxes over two weeks. Seventy percent used both interchangeably. About 30% did show a preference, but it was split: half preferred the cover, half rejected it. This means you can't assume your cat will refuse an enclosed box just because you've read that "cats don't like them." The real predictor is your cat's actual behavior in tight spaces and your home's specific setup.
What the Research Actually Says
If you search "covered vs uncovered litter box," most results pick a side. They're overstating the evidence. Here's what's real.
The Ross University study is the most cited. Researchers gave 28 single-housed cats two identical boxes, one with a removable lid. Most cats used both without hesitation. A 2013 follow-up study (also measuring litter box preference in domestic cats) on 27 cats confirmed this: the majority had no strong preference, but individual variation was significant. Of the eight cats that did prefer one type, it split evenly.
What the studies don't tell you is whether that 70% result holds in multi-cat homes, with smaller commercial boxes (the studies used large storage bins), or with less frequent cleaning. Real homes differ. In practice, I've seen covered boxes accumulate odor faster and get cleaned less often because owners can't see the litter level. Cats notice. Box size is the stronger variable. Cats prefer larger open spaces. When researchers used unusually large bins (32.5 by 19.75 by 19 inches), twice the typical covered-box size, more cats tolerated the cover. When the chamber is cramped, a cover makes it feel like a trap.
The Traits That Predict a Problem
If your cat is going to object to a covered box, there are usually signs beforehand. You can see them now, before you spend the money.
Escape-route sensitivity. Does your cat panic in a carrier? Does she sprint for the exit when cornered? Cats wired this way experience enclosed spaces as inescapable. They'll resist a litter box that feels like a cage, even if it's actually open at the front. If your cat is the first one out of a crate and refuses carriers entirely, a covered box is a gamble.
Behavior in confined spaces. Watch how your cat acts in small rooms, cupboards, or closets. Does she seem calm and exploratory, or does she pace and want out? If she's always seeking the open door, she probably won't love a fully enclosed chamber. A hood with only one entry point can feel claustrophobic to that cat.
Turning radius before eliminating. Cats often make a small circle or shift position before they go. Covered boxes shrink the space to do this. If your cat is large or picks a spot in the box that leaves little room to maneuver, the lid overhead becomes an actual obstacle, not just a roof. Big cats especially struggle with tight commercial models.
Multi-cat household dynamics. In a single-cat home, an enclosed box is neutral or sometimes comforting (privacy). In a multi-cat home, it's a liability. A cat in a covered box can't monitor approaching cats or escape quickly if a housemate decides to block the entrance. Many cats in multi-cat homes will eventually avoid a covered box because it puts them at a disadvantage, not because they dislike the cover itself.
How to Test It Before You Spend
You don't have to guess. If you're on the fence, do a trial run.
The cardboard box test. Get a large cardboard storage box, open one end or side, and place it over or next to your current litter box setup. Tape or weight it so it won't collapse. Does your cat use it? Does she seem hesitant or quickly abandon it? Do this for three to five days. You'll see her honest reaction.
The behavior audit. Spend a few days just watching. Place your cat in a small bathroom or closet and close the door for a short period (nothing stressful, just a few minutes). How does she react? Is she calm and exploring, or is she meowing and pacing? Cats that pace and feel trapped in small rooms will likely avoid a covered box.
The existing hood trial. If you know anyone with a covered box they're not using, borrow it for a week. Set it up exactly as they tell you to, making sure it's clean and filled properly. Your cat's reaction will be direct and honest.
If You Already Bought the Wrong One
I've learned this through failure. If your cat is refusing a covered box or has suddenly stopped using it, don't assume she'll adjust with time. Some cats do; many don't. Read through the covered unit I bought and my cat refused if your situation mirrors mine, where an automatic litter box's cover became the problem. That article walks through what happened with Mao and why I removed the hood.
If your cat's refusal is accompanied by any behavior change, spraying, or avoiding the litter area entirely, see the medical red flags to rule out first before treating this as a preference problem. If your cat is simply refusing the covered box but using open boxes happily, the decision is clear: switch back. Some cats are indifferent, some actually like the privacy, and some absolutely will not use them.
For multi-cat homes, check the five-year multi-cat account to see how that setup is actually used in practice. Some covered automatic boxes work well with multiple cats if the design is spacious enough. Others create bottlenecks and territory disputes. If size is the issue, large cats and chamber space has guidance on chamber dimensions and turning radius. A large cat refusing a covered box isn't being difficult; she's being practical.
FAQ
Can I train my cat to use a covered box if she refuses it now?
Not reliably. Cats aren't being stubborn; they're communicating something. If your cat has rejected a covered box for more than a week, switching back to open is usually the path of less resistance. Some cats do adjust over months, but most won't. Time spent trying rarely pays off.
If my cat is indifferent now, will she stay indifferent if I switch to covered?
Probably not forever. If your cat uses both boxes equally in a test, she's genuinely indifferent now. But real-world conditions matter. If a covered box gets cleaned less often, sits in a closed-off corner, or puts her at a disadvantage in a multi-cat home, that indifference can shift. The setting changes the experience.
Is there a covered box design that works better for cats that don't like enclosed spaces?
Models with larger openings, removable lids, and elevated ceilings help. But if box size is truly large and the opening is genuinely spacious, some cats are fine. Read the dimensions yourself rather than trusting marketing language. A "spacious" covered box is often just standard size with a bigger price tag.
Do automatic covered boxes have different results than regular covered boxes?
Not fundamentally. The cover is the cover. Automatic boxes add complications: noise, motion, and unpredictable cleaning cycles. If your cat is already uncomfortable in enclosed spaces, adding mechanical surprises usually makes it worse. I've tested this across Litter-Robot models and others. The lid and motor together create more stress, not less.