Litter Box That Keeps Dogs Out: 3 Setups That Actually Work
Dogs love litter-box snacks, and that is bad for them and stressful for your cat. Block access in a way the cat can still use.
By Jamilur Rahman Updated November 5, 2026 · 8 min read
- Time
- 20 min
- Cost
- $20-$50
- Difficulty
- Easy
In this guide
Quick answer
A dog gets into the litter box because it smells like a snack, and your cat needs a spot the dog cannot reach. Three setups work: a door held open a few inches or a gate with a cat gap, a top-entry covered box, or a cabinet with a small cat opening. Match the setup to your dog's size, and never lock the cat out.
Free fix vs. permanent fix
Hold a door open a few inches, or raise the box
- Put the box in a room with a door and prop the door open about 5 inches
- Use a rubber doorstop or a door strap so the gap stays the same
- Or set the box on a washer or shelf your cat can jump to
- Keep an eye on whether your cat is still using the box
How long it lasts: Works well for medium and large dogs that cannot squeeze through a gap. A small or determined dog may still get through, and the setup needs checking each time the door is closed.
A top-entry covered litter box
A top-entry box has its only opening on the lid. The cat jumps in, and a dog cannot reach the litter from the floor. It does not rely on a gap or a door that gets moved, so it keeps working on days when you forget.
What to get: Top-entry covered litter box
How long it lasts: Years. Nothing to prop, close or reset, and the dog cannot just walk up to the box.
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What you'll need
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Rubber doorstop or door strap
Holds a door open at a fixed gap, wide enough for a cat and too narrow for a dog
You have it -
Tape measure
Measure your dog's shoulder width and your cat's body width
You have it - Our pick Illustration
Top-entry covered litter box
The most reliable setup for most homes
- Illustration
Pet gate with a small cat door
Works for a doorway, and the dog stays on the other side
- Illustration
Litter box enclosure cabinet with a small cat opening
Hides the box and keeps the dog out, if the opening is small
Why it happens
Litter and waste smell like a snack
Many dogs are drawn to cat feces and clumping litter. Eating it is common, which is why it is worth blocking, not just tolerating.
The box is at dog height, in an open spot
A box on the floor in a hallway or living room is easy to reach. The dog can walk right up to it.
A cover with a wide, open entry
A hooded box with a big front opening keeps litter in but lets a nose in. A dog with a long snout can still reach the waste.
A gate or door the dog can push through
A flimsy baby gate gets knocked over, and a loosely propped door can swing wide. Small dogs may also slip under a gap that works for a big dog.
Try this first (free)
Do these in order, starting with the simplest.
-
1. Move the box to a room the dog does not need
A laundry room, small bathroom or spare room works. Pick one where the cat can reach the box at any hour, including at night. Keep litter away from the cat's food and water.
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2. Prop the door open to a cat-sized gap
Tool used: Rubber doorstop or door strapHold the door open about 5 inches with a doorstop or a strap, so a cat slips through and a medium or large dog cannot. Test it with your dog, since a small one may fit.
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3. Raise the box where the cat can jump
A washer, a shelf or a sturdy counter works if your cat is young and healthy. Put a step stool or a stair for older cats. Make sure it is stable and not near a hot appliance.
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4. Measure the gap against both animals
Tool used: Tape measureMeasure your dog's shoulder width and your cat's widest point. The gap should clear the cat by an inch or so and stop the dog. Do not use a gap the cat has to squeeze through.
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5. Scoop daily and watch the cat
A clean box is less tempting, and your cat is likelier to keep using it. If the cat starts going outside the box after the change, undo the change and check with your vet.
When free fixes aren't enough
If you have a small dog that fits through the gap, if the door must stay closed, or if you want something that works without resetting, the free setup falls short. A top-entry box or a cabinet with a small cat opening does the job without a door to prop. It also stops the dog from nosing the lid open, which is common with hooded boxes. If your cat is a kitten or has sore joints, a high entry may not suit, so use the gate setup.
Buy the fix
Still stuck after the free fixes? These are the products we would look at.
| Pick | Product | Fixes | Who it's for | Buy |
|---|---|---|---|---|
| Best pick | Top-entry covered litter box | a dog that reaches the box from the floor | Homes with a medium or large dog and a healthy adult cat that jumps well. | Check price |
| Budget pick | Pet gate with a small cat door | a dog that wanders into the cat's room | Anyone with a doorway they can close, and a cat that can use a small flap or opening. | Check price |
| Upgrade pick | Litter box enclosure cabinet with a small cat opening | a dog reaching the box, and a box that looks bad in the room | People who want the box out of sight and the dog out of the box. | Check price |
Top-entry covered litter box
Fixes: a dog that reaches the box from the floor
Look for: A lid opening sized for your cat, with a roomy interior; A heavy or locking lid that a dog cannot lift; A sturdy base that does not tip when the cat jumps in; A cover that comes off easily for cleaning.
- Who it's for
- Homes with a medium or large dog and a healthy adult cat that jumps well.
- Honest downside
- Your cat is a kitten, a senior or has arthritis. A high entry is hard on them, so use a gate setup instead.
Pet gate with a small cat door
Fixes: a dog that wanders into the cat's room
Look for: A cat door sized for your cat and too small for your dog; A snug fit in your doorway with no gaps at the sides; A frame that is tall enough to stop your dog from hopping it.
- Who it's for
- Anyone with a doorway they can close, and a cat that can use a small flap or opening.
- Honest downside
- Your dog is small enough to fit through the cat door, or can jump the gate. Measure the dog first.
Litter box enclosure cabinet with a small cat opening
Fixes: a dog reaching the box, and a box that looks bad in the room
Look for: A cat opening that turns into a short tunnel or a side wall, so a snout cannot reach the litter; Solid construction that does not tip or flex; A lift-off or hinged top so you can scoop easily.
- Who it's for
- People who want the box out of sight and the dog out of the box.
- Honest downside
- Your dog is small and can enter the cat opening, or your cat is large and cannot fit in comfortably.
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How we picked: How we picked: this page is based on veterinary advice on litter-box habits and dogs eating litter, product instructions for gates and enclosures, and the setups owners report in reviews. We do not test products by hand.
Match the setup to your dog's size
- Large dog: a door gap or a gate with a cat door usually works, and a top-entry box adds backup.
- Medium dog: a top-entry box or a tunnel-entry cabinet; test any gap first.
- Small or determined dog: a top-entry box with a heavy lid, in a room with the door closed.
Keep it easy for the cat
Your cat must be able to reach the box at all hours. Never lock a cat in or out of a room. If the cat stops using the box, or strains, cries or passes blood, see a vet, since those can be signs of a urinary problem and not a protest about the new setup. The related guide on box aversion covers what to check first.
What to skip
A plain hooded box with a big front flap
A hooded box with a wide open entry only hides the box. A dog with a long snout can still reach inside, or push the lid off. A flimsy baby gate that the dog can lean on also fails.
Frequently asked questions
Why does my dog eat cat poop?
Is eating clumping litter dangerous for a dog?
Will my cat use a top-entry box?
What if my dog is small?
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