Feeding a cat with pica starts with a higher-fiber diet, safe chewing alternatives, and ruling out any underlying medical cause. No single nutritional deficiency has been definitively proven to cause pica in cats, but dietary adjustments are one of the most practical tools you have to reduce the behavior.
Why Diet Matters for Cats With Pica
Pica, the compulsive eating of non-food items like plastic, fabric, rubber bands, or cardboard, has multiple possible triggers. Stress, boredom, genetics (Oriental breeds are overrepresented), and gastrointestinal problems can all play a role. One persistent theory is that affected cats crave fiber they aren’t getting from their current food. While a clear nutritional deficiency has never been formally documented as the cause, many cats improve when their diet changes, which suggests that what you’re feeding does matter even if researchers can’t yet pinpoint exactly why.
Before changing your cat’s food, it’s worth having your vet run bloodwork, a urine test, and a stool exam. Conditions like anemia, hyperthyroidism, inflammatory bowel disease, and intestinal parasites can all drive pica-like behavior. There’s no single diagnostic test for pica itself, so ruling out medical causes is how vets narrow things down. If a health issue is fueling the chewing, no amount of dietary tweaking will fix it on its own.
Increase Fiber in the Diet
The most common dietary recommendation for cats with pica is boosting fiber intake. This can satisfy whatever oral or digestive urge is driving your cat to seek out non-food textures. There are a few ways to do this:
- Switch to a higher-fiber commercial food. Look for cat foods marketed for hairball control or digestive health. These typically contain more plant-based fiber (often around 8 to 10 percent crude fiber) compared to standard formulas that hover around 2 to 4 percent. Your vet can recommend a specific product if you’re unsure.
- Add a fiber supplement. A small amount of plain canned pumpkin (not pie filling) mixed into wet food provides soluble fiber. Start with about a teaspoon per meal and adjust based on your cat’s stool consistency. Psyllium husk is another option, though it needs to be introduced gradually and with plenty of water.
- Offer cat grass. Wheatgrass or oat grass grown indoors gives your cat a safe, fibrous plant to chew. Many cats with pica redirect their chewing toward grass when it’s available, which is harmless and may reduce interest in more dangerous targets like string or plastic bags.
If your cat is currently on an all-dry diet, switching to wet food or a mix of wet and dry can also help. Wet food has higher moisture content, which supports digestion and can make meals feel more satisfying.
Consider an Anxiety-Reducing Diet
Because pica often has a stress or anxiety component, diets supplemented with calming nutrients can help. L-tryptophan, an amino acid that the body converts into serotonin and melatonin, has been evaluated for repetitive behaviors and stress-related issues in cats. Alpha-casozepine, a protein fragment derived from cow’s milk, acts on calming receptors in the brain in a way similar to anti-anxiety medications but without side effects like sedation or aggression.
A study published in the Journal of Feline Medicine and Surgery tested a diet supplemented with both L-tryptophan and alpha-casozepine. Cats eating the supplemented diet showed reduced anxiety responses, including less freezing behavior and more relaxed activity patterns in unfamiliar environments. The researchers couldn’t determine whether the benefit came from one ingredient or the combination, but the overall effect was meaningful. Commercial diets formulated for anxious cats use these ingredients, and standalone supplements containing alpha-casozepine or L-tryptophan are also available.
These calming ingredients won’t eliminate pica on their own, but if your cat’s chewing ramps up during stressful events (a move, a new pet, changes in routine), they’re worth trying alongside other dietary changes.
Provide Safe Chewing Outlets
Diet isn’t only about what goes in the bowl. Cats with pica have a strong oral fixation, and giving them appropriate things to chew reduces the chance they’ll eat something dangerous. Dried fish skins, dehydrated chicken strips, and dental chew treats all offer texture and resistance. Some owners offer raw chicken necks or wings (under supervision) for cats who crave tearing and gnawing, though raw feeding carries its own safety considerations.
Puzzle feeders serve double duty here. They slow down eating, extend mealtime, and engage your cat’s brain. A cat that spends 20 minutes working kibble out of a puzzle toy is a cat that isn’t chewing on a shoelace. Rotating between different feeder styles keeps the novelty high.
Feeding Patterns That Help
How often you feed can be as important as what you feed. Cats with pica often do better with smaller, more frequent meals rather than one or two large ones. Splitting the same daily amount into three or four portions keeps their gut occupied for more of the day and reduces the empty-stomach restlessness that can trigger chewing episodes.
Timed automatic feeders are especially useful if your cat’s pica peaks overnight or while you’re at work. Setting a feeder to dispense a small portion at 2 a.m. can interrupt the window when many cats do their most determined fabric-chewing or plastic-eating.
Foods and Items to Remove
While you adjust your cat’s diet, managing the environment is just as critical. Cats with pica can develop strong preferences for specific materials. Common targets include wool, cotton, plastic bags, rubber bands, string, and houseplants. Ingesting these can cause intestinal blockages that require emergency surgery, so prevention matters.
Keep targeted items out of reach entirely. Store plastic bags in closed cabinets. Pick up hair ties and rubber bands. If your cat chews houseplants, remove any toxic species (lilies are fatal to cats even in small amounts) and replace them with cat grass or catnip. The goal is to make the safe option the easiest option while you give the dietary changes time to take effect.
Most owners notice a gradual reduction in pica behavior over several weeks of dietary and environmental changes. Some cats improve quickly, while others need ongoing management. If the behavior persists despite a higher-fiber diet, calming supplements, and enrichment, your vet may explore behavioral medication as an additional layer of support.