If your cat has ever dragged a plastic wrapper out from behind the couch and started chewing on it, you know that specific chill — because from across the room, you can't tell whether a piece went down or not.
Cats investigate the world with their mouths. Kneading and suckling are leftover kitten behaviors, and mouthing a new texture is part of how a cat gathers information. Most of that is harmless. But when mouthing turns into deliberately eating things that aren't food — plastic wrap, string, fabric, foam, rubber bands — it has a name: cat pica. It isn't greed, and it isn't naughtiness. It's a behavior that almost always has a reason underneath it.
Here at Purromp, we're cat people first. This guide comes from our own experience living with cats, published feline behavior research, and what we hear from cat owners every day. We can't give you a definitive answer for your specific cat — pica has several possible causes and they overlap — but we can tell you what to watch for, what's genuinely dangerous, and where to start.
Tip : See our guide to stopping a cat from chewing cables and cords for more on redirecting a mouthy cat.
Why Do Cats Eat Plastic, String, and Fabric?
Pica — the repeated eating of non-food items — isn't one thing with one cause. In our experience, owners tend to assume it's either boredom or a missing nutrient, and neither explanation holds up on its own.
On the medical side, a vet will want to rule out anemia, chronic gastrointestinal disease (long-term vomiting, inflammatory bowel disease), hyperthyroidism, oral or dental pain, and neurological problems. Some cats also develop compulsive patterns that look a great deal like pica. None of these can be identified by watching your cat at home — they need bloodwork, imaging, or an ultrasound.
Dental pain is easy to miss, because cats hide it. The 2025 FelineVMA oral health guidelines note that oral disease is common in cats — periodontal disease being the most frequently diagnosed dental condition — and that it's only reversible before bone is lost around the tooth. Their prevalence figures come from several different studies in different populations (one UK primary-care review found a 15.2% one-year prevalence; one cohort found gingivitis in 24.5% of cats under 12 months and 56.3% at five to six years), so read those as a sign of how common this is rather than one clean number. The takeaway for a cat who suddenly chews: a sore mouth is worth checking (Lobprise et al., 2025).
Behavioral triggers are real too — boredom, household stress like a move or a new pet or a new baby, too little space to climb and hunt in, and the attention payoff that comes from a dramatic reaction when your cat bites something they shouldn't.
One widely repeated claim deserves a caveat. A case-control study of privately owned cats found pica most often directed at shoelaces and string, then plastic, fabric, rubber, paper and cardboard, and wood. Notably, the authors did not find poor environment or early weaning to explain the cases they studied (Demontigny-Bédard et al., 2016). That study relied on owner questionnaires, which are prone to self-report bias, and the authors are explicit that more research is needed. So if your cat eats plastic, don't assume you did something wrong. Assume you need more information.
How to Tell Ordinary Chewing from Cat Pica
Not every cat with a plastic habit has pica. Normal mouthing looks like this: your cat bites a toy, shakes it, maybe chews a cardboard box corner, then lets go. Nothing goes down, and it happens around play or mealtimes.
Sucking and kneading is its own category. A cat who suckles a blanket corner while purring and kneading is self-soothing, and it shows up more often in Siamese, Burmese, and Oriental shorthairs — sometimes continuing from kittenhood into adulthood. If nothing is swallowed, the risk is fairly low. The moment fabric starts disappearing, you're in pica territory.
Pica usually looks different. The cat seeks out one specific material over and over, actually swallows it, and often does it when nobody is watching. You may also notice vomiting, retching, a drop in appetite, constipation, or weight changes. The same case-control study found that cats with pica were more likely to show self-sucking behavior and more likely to vomit than cats without it — but the authors state plainly that the causal relationship between pica and vomiting has not been established. Treat that as a pattern to watch, not a cause (Demontigny-Bédard et al., 2016).
Keep a log for seven days. Write down the time, the material, whether it was swallowed or spat out, and what happened right before. Keep or photograph a sample of whatever you can. Bring that to the vet — it's far more useful than trying to describe it from memory.
One simple test: offer a chewable wood stick and see what your cat does. If it takes the stick and works on it, the need may just be "something to bite." If it ignores the stick and goes straight back to plastic and cloth, that points to something more specific. Our Silvervine Sticks are what we hand cats for this, and they hold up to repeated chewing — though you should always supervise.
Why String and Thread Are the Most Dangerous
Linear foreign bodies are the emergency in this category. We mean thread, yarn, ribbon, dental floss, hair ties, and the string on a toy. One end can catch under the tongue or at the stomach's outflow while the rest keeps moving through the gut. The intestine then folds like an accordion around the taut line and can be cut through from the inside.
The result isn't a simple blockage. It's plication, loss of blood supply, perforation, and peritonitis — usually emergency surgery, and a few hours can change the outcome.
Other high-risk items include foam and sponge, which crumble and pack down; plastic wrap and bag corners; rubber bands; clumping litter swallowed in large amounts; button batteries, which cause chemical burns; medications; and loose sutures.
Watch for repeated vomiting or unproductive retching, drooling, pawing at the mouth, lethargy, hiding, refusing food, a hunched back or crying when picked up, and either no bowel movements or diarrhea.
Note: if you see string hanging from your cat's mouth or rear end, do not pull it. Trim the visible excess so it doesn't get stepped on, keep the piece as a sample, and go to the vet immediately. Tell them the material, roughly how long it was, and when you think it happened.
Deep Dive: Cat Pica Warning Signs That Need a Vet Today
Go today, as an emergency — continuous vomiting or dry retching, heavy drooling, obvious belly pain, rapid breathing, pale gums, weakness or an unsteady walk, or more than 24 hours without eating.
Book within 48 hours — repeated swallowing of non-food items without emergency signs, changes in appetite or litter box habits, weight loss, a dull coat, or any known ingestion of a battery or medication.
Bring the sample, the seven-day log, and photos or video if you have them. Depending on what your vet suspects, they may recommend X-rays, an ultrasound, a barium study, or endoscopy.
Do not try to make your cat vomit at home, and skip the old remedies — oil, salt, milk. With sharp or linear objects, induced vomiting can do more damage than the object itself.
If every test comes back normal, the picture usually shifts toward behavior. That's when a veterinary behaviorist is a better next step than another food change.
How to Reduce Pica Triggers at Home
Start with management, because it's free and it works immediately. Lidded bins. Drawers for string, hair ties, and floss. Foam and plastic wrap straight into a closed container. Sewing kits out of reach. One obstruction surgery costs a great deal more than a drawer organizer.
Then complete the daily hunt. Two wand sessions of ten minutes or more, letting your cat run the whole sequence — stare, stalk, pounce, grab, bite, eat. A cat whose mouth gets used the way it evolved to be used tends to go looking for trouble less.
Stress matters too, though carefully. In a UK birth cohort of 534 cats, owners reported pica behavior in 42.9% of cats at six months, 32.0% at twelve months, and 30.9% at eighteen months. Cats with persistent pica were more likely to have moved house between six and twelve months, to live in rented housing, and to have had no dog in the home at two to four months old (Kinsman et al., 2021). Those are associations from owner-reported data in a single country — not proof that moving house causes pica. What it does suggest is that a stable routine and a reliable retreat space during household changes are worth protecting.
Don't punish it. Shouting or spraying adds anxiety and teaches your cat to do it where you can't see, which is the opposite of what you need.
For cats who spend long stretches alone, changing the environment helps. The Catnip and Silvervine Wobbler Toy rocks and rolls on its own, so there's something in the room that moves without you — not a cure for anything, just a way to redirect energy and mouthing onto a safe object.
How to Offer Safe Chew Outlets (and What They Can't Do)
Let's set the boundary first: no toy treats cat pica. Medical causes need a vet, and compulsive behavior may need a behavior specialist. What a toy can do is give your cat a legal outlet for a normal urge, which lowers the odds that the nearest plastic bag becomes the target.
Chewable natural materials work best for the cat who bites and destroys. Silvervine sticks in particular can be worked on again and again, and they replace the "gnaw a plastic strip" motion with something that breaks down safely rather than shredding into swallowable pieces. Keep them in the rotation and check them often.
Catnip and silvervine toys are better suited to batting, grabbing, and bunny-kicking — great inside a play session, not so great as a babysitter you leave behind. Our Cat Chew Toys collection is where we group the ones built to survive teeth, and for cats who prefer to carry and bat rather than chew, the round catnip shapes tend to get more use than anything with a string attached.
Three rules for whatever you choose. Keep only one or two items out at a time and rotate them so they stay interesting. Retire anything that splinters, cracks, or exposes thread — a worn toy becomes a foreign body. And supervise, especially with anything string-like.
If you've offered good chew options and your cat still hunts down plastic, fabric, and string, go back to the vet. That pattern means the need isn't simply "I want to bite something."
Cat Pica FAQs
Does pica mean my cat is missing nutrients or minerals?
The idea is widespread, but the evidence is thin. A small number of cases have been linked to anemia, low fiber, or other metabolic issues, yet "add a supplement" is not a diagnosis. The order that makes sense is bloodwork and a physical exam first, to rule out anemia, hyperthyroidism, gastrointestinal disease, and oral pain, and behavioral work after that.
My cat only chews string and never swallows it. Should I still worry?
Lower risk, but not zero. String breaks easily, and a short piece can go down by accident during ordinary chewing. Even a short linear object can cause an intestine to fold on itself, which is why the safe move is to store string, hair ties, floss, and ribbon out of reach and offer a chewable alternative instead.
Will catnip balls or silvervine sticks fix pica?
No. They are not a treatment and shouldn't be treated as one. Their job is to give a cat a safe place to put normal chewing and biting behavior, which reduces the chances they go after plastic or fabric. If the behavior has a medical cause or has become compulsive, a veterinarian still needs to be involved.
If I see string hanging from my cat's mouth or bottom, can I pull it out?
Never pull. The line may be anchored under the tongue or somewhere in the gut, and tugging can cut tissue, cause a perforation, or lead to peritonitis. Cut off the excess that's hanging outside and keep it as a sample, then get your cat to a vet right away and tell them the material, the approximate length, and when it happened.
My Siamese sucks on blankets and chews wool. Is that pica?
Fabric sucking is more common in Siamese, Burmese, and Oriental shorthairs and usually looks self-soothing — kneading, purring, and suckling a blanket edge. If your cat only sucks and never swallows, the risk is relatively low. Once fabric or thread is actually being swallowed, treat it as pica, because the risks are the same as for any swallowed foreign object.
My kitten chews everything. Will they grow out of it?
Mouthing is normal for kittens exploring their world, and some of it does fade with age. But if your cat is still swallowing non-food items at around a year old, is fixated on one type of material, or has started vomiting or losing appetite, don't wait. Get a physical exam and start behavior management at the same time.
Conclusion
Watching a cat eat something that isn't food is unsettling, and the honest answer is that you can't always tell from the outside whether it's a habit, a symptom, or an emergency. What you can do is log what you see, remove the obvious hazards, and let a vet rule out the medical reasons before you decide it's "just behavior." It may take some time to get to the bottom of it — that's normal, and it isn't a failure on your part.
Suggested Reading
- Why Does Your Cat Chew on Everything? (And What to Give Instead)
- How to Choose a Safe Cat Chew Toy: Material, Size, and Scent
- How to Keep a Bored Indoor Cat From Destroying Your Home
Sources
- Demontigny-Bédard, I., Beauchamp, G., Bélanger, M. C., & Frank, D. (2016). Characterization of pica and chewing behaviors in privately owned cats: a case-control study. Journal of Feline Medicine and Surgery, 18(8):652-657. link
- Kinsman, R., Casey, R., & Murray, J. (2021). Owner-Reported Pica in Domestic Cats Enrolled onto a Birth Cohort Study. Animals (Basel), 11(4):1101. link
- Lobprise, H., St Denis, K., Anderson, J. G., Hoyer, N., Fiani, N., & Yaroslav, J. (2025). 2025 FelineVMA feline oral health and dental care guidelines. Journal of Feline Medicine and Surgery, 27(11):1098612X251398793. link
