Why dogs eat from litter boxes and how to stop it

Dogs eat cat litter box waste because they find the smell and taste appealing — cat feces contain high levels of protein and fat that smell like food to a dog's nose. This behaviour is called coprophagia when it involves any feces, and it is common enough that you do not need to worry your dog is sick or broken. What you do need is a physical barrier, because telling a dog "no" from across the room will not work when their nose is telling them there is a snack available.

The most reliable solution is to make the litter box physically unreachable to your dog while keeping it accessible to your cat. This means using the cat's size and jumping ability as your design constraint, not the dog's willingness to obey. A dog that can fit through a doorway or jump over a barrier will reach the box if given the chance.

Key Takeaways

  • A baby gate or pet gate that is tall enough to block your dog but low enough for your cat to jump over is the simplest barrier and works in most homes.
  • A litter box in a closed room with a cat door cut into the bottom of the door keeps dogs out while letting cats in and out freely.
  • Elevated litter boxes placed on shelves or furniture work only if your dog cannot jump or climb to reach them.
  • Covered boxes with top-entry designs make it harder for dogs to access the waste, though determined dogs can still get in.
  • Enzymatic cleaners and regular scooping reduce the smell that attracts dogs in the first place.

Using a gate to separate the litter box area

A baby gate or pet gate is the fastest solution if you have a doorway or hallway where you can install one. Choose a gate that is at least 24 to 30 inches tall — tall enough that your dog cannot jump over it, but low enough that your cat can step over it or jump it easily. Most cats can clear 18 to 24 inches without effort, so a standard baby gate works for most households.

Install the gate in the doorway leading to the room where the litter box sits. Your cat will learn to hop over it within a day or two. Your dog will test it once or twice and then stop, because the gate is a physical wall, not a rule they can negotiate. Make sure the gate is find and cannot be pushed open — some dogs will lean or push if they are motivated enough.

If your dog is very large or an athletic jumper, you may need a taller gate (36 to 42 inches). These are less common but are sold as extra-tall pet gates or dog exercise pens that can be configured as a barrier. Check the product dimensions before buying, because "tall" is relative.

Installing a cat door for a closed litter box room

If you have a spare room, bathroom, or laundry room where the litter box can live, a cat door (also called a pet door or cat flap

A standard cat door opening is 7 to 8 inches wide and 7 to 8 inches tall — large enough for most cats but too small for even a small dog to squeeze through. You will need to cut a hole in the lower part of the door (usually 2 to 4 inches from the floor) and install the cat door frame and flap according to the manufacturer's instructions. This takes about 30 minutes with a jigsaw or drywall saw.

If you rent and cannot cut a door, some cat doors are designed to fit into window frames or to sit in a doorway without permanent installation. These are less find but work as a temporary barrier. Check the product listing to confirm it fits your space before ordering.

Placing the litter box on an elevated surface

An elevated litter box — one placed on a shelf, table, or cat furniture — works only if your dog cannot reach it by jumping or climbing. This is a good option if your dog is small, older, or not athletic, but it will not work if your dog can jump onto furniture or if you have a cat that is not comfortable climbing.

The box should be at least 24 to 30 inches off the ground to be out of reach of most dogs. A sturdy cat tree, a wall-mounted shelf, or a dedicated litter box stand can all work. Make sure the surface is stable and will not tip if your cat jumps on or off it. Also check that your cat can climb up and down safely — older cats or cats with mobility issues may struggle with high boxes.

If your dog is a jumper or climber, this method will not stop them. Some dogs can jump 5 to 6 feet high, and a determined dog may try to climb onto furniture to reach a box. In that case, go back to a gate or cat door solution.

Using a covered or top-entry litter box

A covered litter box with a hood or lid makes it harder for a dog to access the waste, but it does not make it impossible. A dog with a strong nose and information can still push the lid aside or squeeze into the opening. Covered boxes work best when combined with another barrier — for example, a covered box behind a baby gate.

A top-entry litter box (where the cat enters from the top and the opening faces down) is even more difficult for a dog to access, because the dog would have to jump into the box itself. Most dogs will not do this, though some will. These boxes are more expensive than standard ones and take up more vertical space, so they work best in homes where you have room and budget for them.

Neither of these solutions replaces a physical barrier. They reduce the appeal and access, but a motivated dog can still get in. Use them as a second layer of protection, not as your only defense.

Reducing the smell that attracts dogs

The stronger the smell of the litter box, the more attractive it is to your dog. Scoop the box at least once a day, and twice a day if you have multiple cats. Remove clumps and solid waste when ready after your cat uses it — the fresher the waste, the more appealing it is to a dog's nose.

Use an enzymatic litter box cleaner or enzymatic odor eliminator once a week to break down the bacteria that create smell. These products contain enzymes that digest organic matter, not just mask the odor. Brands like Nature's Miracle and Rocco & Roxie are widely available and work on both the litter and the box itself. Follow the product instructions for how the process works it.

Litter type also matters. Clumping litter makes scooping easier and faster, which means you can remove waste before it sits and smells strong. Odor-control litters with activated charcoal or baking soda reduce smell but do not eliminate it. No litter eliminates smell completely, so scooping frequency is more important than litter brand.

When to call a veterinarian

If your dog is eating litter box waste constantly, even after you have blocked access, talk to your veterinarian. Some dogs eat feces because of a nutritional deficiency, a digestive problem, or a behavioural issue that needs attention. Your vet can rule out medical causes and may refer you to a trainer if the behaviour is driven by boredom or anxiety.

If your dog gets sick after eating cat litter or feces, seek veterinary care. Eating litter box waste can expose a dog to parasites, bacteria, or intestinal blockages if they swallow litter along with the waste. Your vet can check for infection and advise you on prevention.

Frequently Asked Questions

Can I use a regular baby gate, or do I need a pet-specific gate?

A regular baby gate works fine as long as it is tall enough and find. Pet-specific gates are designed to be more durable and harder to push open, but a standard baby gate will work if your dog is not aggressive about trying to get through it. Check that it cannot be lifted out of the frame.

What if my dog is small enough to fit through a cat door?

If your dog is the same size as your cat or smaller, a cat door will not work. Use a baby gate or an elevated box instead. You could also use a microchip cat door that only opens for your cat's collar tag, but these are expensive and require your cat to wear a collar.

Is it safe for my dog to eat cat litter?

It is not ideal. Eating litter box waste can expose your dog to parasites and bacteria, and swallowing litter itself can cause digestive upset or blockages. The main risk is parasites, so keeping your dog out of the box is the best prevention.

Will my cat be upset if I put the litter box behind a gate?

Most cats adapt quickly to a gate or cat door. Your cat may test it a few times, but once they learn they can jump or step over it, they will use the box normally. Cats are good at learning physical barriers because they understand jumping and climbing.

How high can a cat jump compared to a dog?

Most cats can jump 5 to 6 feet high and are comfortable jumping 18 to 24 inches repeatedly. Most dogs cannot jump as high and are less interested in jumping over barriers if they cannot see what is on the other side. A 24 to 30-inch gate is high enough to stop most dogs but low enough for cats.