Cats chew on paper for a mix of reasons ranging from pure sensory curiosity to hunger patterns, teething, stress, and occasionally underlying health problems. In most cases, occasional paper chewing is harmless and driven by texture. But when a cat regularly eats paper or cardboard (not just shreds it), the behavior crosses into a category called pica, which can signal something worth investigating.
The Texture Is Just Fun
Paper crinkles, tears easily, and moves unpredictably, which taps into a cat’s natural prey drive. The lightweight flutter of a piece of paper mimics the erratic movement of small prey, and the crunchy sound it makes under their teeth is satisfying in a way that’s hard for a bored indoor cat to resist. This is the most common explanation for the cat who occasionally shreds a receipt or gnaws on a cardboard box: it simply feels good and provides a few minutes of stimulation.
Cats also have scent glands in their cheeks, face, and along their jawline. When your cat rubs against or nibbles on paper, they may be depositing their scent on it, essentially marking it as part of their territory. This is the same instinct behind head-bunting your hand or rubbing their face along furniture corners. Paper sitting on a desk or countertop is an easy, accessible surface for this kind of scent marking.
Kittens and Teething
If your paper-chewer is under seven months old, teething is a likely culprit. Kittens begin losing their baby teeth and growing adult teeth starting around 3 months, with the incisors coming in first, the canine teeth (fangs) around 5 months, and the premolars and molars filling in between 4 and 7 months. Chewing at this age is completely normal. Paper and cardboard are soft enough to feel soothing on inflamed gums without being hard enough to cause tooth damage.
Frozen toys and treats can help ease the discomfort, similar to how parents use frozen teething rings for babies. If the chewing tapers off after about 7 months of age, teething was almost certainly the reason.
Hunger and Feeding Patterns
One of the more interesting findings from a large case-control study published in the Journal of Feline Medicine and Surgery is that cats with pica were less likely to be fed on a free-choice (ad libitum) schedule than cats without the behavior. The researchers suggested that cats who eat frequently throughout the day may be less likely to seek out non-food items simply because they don’t experience the same peaks of hunger. This doesn’t mean paper-chewing cats are starving. It means that the gap between scheduled meals might be just long enough to trigger exploratory chewing, especially on items that have a faint scent of food (greasy pizza boxes, paper bags from takeout).
If your cat seems to chew paper most often in the hour or two before mealtime, experimenting with smaller, more frequent meals or a timed feeder could reduce the behavior.
Pica: When Chewing Becomes Eating
Pica is the persistent eating of non-food items, and it’s more common in cats than many owners realize. In the same study of cats with pica, paper and cardboard were among the top targets: 24 out of 100 cats with pica ingested paper, and 61 out of 100 cats with chewing behaviors chose paper as their material. Plastic, fabric, shoelaces, and rubber were also popular.
Researchers have long hypothesized that pica stems from boredom, lack of social contact, early weaning, or anxiety-driven compulsive behavior. The study’s actual findings were more nuanced. Cats with pica did not come from notably worse environments than cats without it. Their access to toys, climbing structures, and other enrichment was similar. Early weaning didn’t clearly predict the behavior either. Some researchers consider pica a compulsive disorder secondary to anxiety, and there does appear to be a genetic component, though the exact mechanism isn’t well understood. Oriental breeds (Siamese, Burmese) have historically been overrepresented in pica cases.
The distinction between casual chewing and pica matters because pica carries real health risks.
Dental Problems as a Hidden Cause
Cats with mouth pain sometimes chew on soft objects in unusual ways, and paper fits the profile. The three most common dental diseases in cats are gingivitis (inflamed, swollen gums), periodontitis (deeper infection of the structures supporting the teeth), and tooth resorption, a painful process where tooth structure breaks down from the inside out. Tooth resorption often first appears as a pinkish defect right at the gumline.
All three conditions can cause cats to eat hesitantly, turn their heads to one side while chewing food, drool, or develop bad breath. A cat dealing with low-grade mouth pain might gravitate toward paper because it’s softer than kibble and provides gentle pressure on sore gums. If your cat’s paper chewing is accompanied by any changes in eating habits, drooling, or foul-smelling breath, a dental issue is worth ruling out.
Stress and Compulsive Behavior
Some cats chew paper as a self-soothing response to stress. Changes in the household, a new pet, a move, construction noise, or even a shift in your work schedule can trigger repetitive behaviors. The chewing itself may release tension in the same way some people bite their nails.
When paper chewing is stress-related, you’ll typically see it alongside other signs: overgrooming (bald patches on the belly or legs), hiding more than usual, changes in litter box habits, or increased clinginess. Addressing the underlying stressor usually helps more than simply removing the paper, since a stressed cat will often redirect to another object.
When Paper Chewing Gets Dangerous
Shredding paper into confetti and walking away is one thing. Swallowing it regularly is another. Small amounts of paper generally pass through a cat’s digestive tract without trouble, but larger or repeated ingestion can cause a gastrointestinal obstruction. Signs of a blockage include vomiting, loss of appetite, lethargy, diarrhea, and in severe cases, signs of shock. Vomiting and refusing food are the most common early warnings. Linear objects like ribbons or string are the most notorious obstruction hazards, but wadded-up paper or cardboard can also compact in the intestines.
If your cat is actively swallowing paper (not just chewing and spitting it out), and you notice any combination of vomiting, lethargy, or appetite loss, that warrants prompt veterinary attention.
How to Reduce the Behavior
Start by identifying the pattern. Does the chewing happen at specific times (before meals, when you’re away, late at night)? That timing often points to the cause. A few practical approaches:
- Increase feeding frequency. Splitting the same daily amount of food into three or four smaller meals, or using a puzzle feeder, can reduce hunger-driven chewing.
- Add interactive play. Ten to fifteen minutes of active play with a wand toy twice a day gives your cat an outlet for predatory energy that paper is currently absorbing.
- Provide safe chew alternatives. Cat grass, dental chew treats, or textured chew toys give cats something appropriate to gnaw on.
- Limit access. Keeping paper, mail, and cardboard out of reach won’t fix the underlying motivation, but it prevents ingestion while you work on the root cause.
- Rule out medical causes. If the behavior is new, persistent, or escalating, a vet visit can check for dental disease, nutritional gaps, or signs of compulsive disorder.
Most cats who chew paper occasionally are simply entertaining themselves with an interesting texture. The behavior becomes worth investigating when it’s frequent, when the cat is swallowing the material, or when it appears alongside other behavioral or physical changes.