Why is My Cat Eating Litter?

When a cat starts eating litter, it can catch pet owners off guard. This behavior often seems out of place, especially when a cat has otherwise appeared healthy. If you’ve ever scooped the litter box only to discover that your cat is consuming the litter itself, you’re not alone—and you’re right to pay attention. The question, “Why is my cat eating litter?” isn’t just about curiosity. It can be a sign that something more is going on beneath the surface. Cats rarely do anything without a reason, and this behavior is worth investigating. If you notice your cat frequently nibbling, chewing, or eating litter, please call Pewaukee Veterinary Service at (262) 347-0787 to schedule an appointment. Your veterinarian can help determine whether an underlying issue needs attention.

What Could Cause a Cat to Eat Litter?

Cats are instinctively clean animals, so when they start interacting with their litter in unexpected ways, there’s usually a reason behind it. When pet owners ask, “Why is my cat eating litter?” several possibilities come to mind. These range from behavioral to medical concerns. While some kittens may chew litter out of curiosity, persistent litter-eating behavior can suggest something more serious. Let’s explore some of the most common reasons cats engage in this behavior.

Curiosity in Kittens

Kittens are naturally curious and may experiment with their surroundings—including the litter box. Much like human babies who explore with their mouths, kittens use their senses to better understand their environment. If they are newly weaned or still adjusting to solid foods, they may sample non-food items like litter. Most kittens outgrow this behavior quickly, especially if they learn the litter box is for elimination only. If the behavior continues past the kitten stage, it may signal a different concern.

Anemia

Anemia occurs when the body doesn’t have enough healthy red blood cells to carry oxygen to tissues. Symptoms can include lethargy, pale gums, and unusual eating behaviors—including pica, the urge to eat non-food items. If you’re asking, “Why is my cat eating litter?” and your cat seems tired or not acting like themselves, anemia could be one potential reason. A veterinary examination can determine if bloodwork is needed.

Nutritional Deficiencies

A cat that lacks certain vitamins or minerals may instinctively seek out alternative sources, even if those sources are not digestible. Some types of clay litter contain minerals like clay or sodium bentonite, which could attract a cat that is missing key nutrients from their diet. This behavior could indicate that your cat’s current food isn’t meeting their nutritional needs. Your veterinarian can evaluate your cat’s diet and recommend any needed adjustments. If you live in the Pewaukee area and have noticed this behavior, please call (262) 347-0787 to speak with a team member at Pewaukee Veterinary Service.

Pica in Cats

Pica refers to the persistent craving and consumption of non-food substances, such as fabric, plastic, paper—or litter. It can occur in cats of any age and may be linked to behavioral, neurological, or nutritional causes. In many cases, the reason for pica is complex, and the behavior often requires veterinary insight to diagnose and manage. Pica may also be related to stress or environmental changes. If your cat recently experienced a shift in routine, such as a move or a new pet in the home, this could trigger litter-eating behavior. While not all cats will develop pica under stress, those who do may benefit from a calm and structured environment.

Is Litter Type a Factor?

The type of litter you use can also influence your cat’s behavior. Some litters are more attractive than others due to their texture, smell, or mineral content. If you’re asking, “Why is my cat eating litter?” and have recently switched brands, that change might be part of the answer.

Clay-Based Litter

Sodium bentonite, the ingredient used to form clumps, may be appealing to cats with certain deficiencies. This is especially true for cats with pica or anemia, who may be drawn to the clay as a source of minerals—even though it’s not safe for consumption.

Natural or Corn-Based Litters

Litters made from corn, wheat, or walnut shells may also tempt a cat who is hungry or exploring. While these are marketed as eco-friendly alternatives, their organic composition may cause some cats to view them as edible. It’s important to monitor your cat closely if you make a switch to a more natural litter to see how they respond.

Could Stress Be a Trigger?

Cats are sensitive to changes in their environment. When something disrupts their sense of safety or control, they may act out in unexpected ways. If your cat is eating litter, one possible explanation could be stress. Asking “Why is my cat eating litter?” might lead to a closer look at recent changes at home.

Changes at Home

New pets, visitors, loud noises, or moving to a new house can all impact a cat’s emotional health. Some cats internalize stress and may develop habits like eating litter as a coping mechanism. Others might become more vocal, withdrawn, or start missing the litter box entirely. Providing your cat with a stable routine, plenty of quiet resting areas, and access to enrichment (like climbing shelves or window perches) can support mental well-being. However, it’s still wise to have a vet evaluate the behavior to rule out medical causes.

When Is It Necessary to Contact Your Veterinarian?

If you find yourself searching, “Why is my cat eating litter?” more than once, it’s time to schedule a veterinary visit. Occasional curiosity in young cats may not require immediate intervention, but ongoing or sudden behavior changes should not be ignored. Cats rarely display symptoms without cause, and this kind of behavior may be your cat’s way of signaling that something is wrong. Litter consumption can lead to blockages or digestive issues if left unaddressed. Even if the underlying issue turns out to be minor, it’s safer to let your veterinarian determine the cause. The team at Pewaukee Veterinary Service will treat your concerns with care and provide a thorough evaluation. Please call (262) 347-0787 to book an appointment.