Why Does My Cat Eat My Hair? Pica and Chewing Explained

Name: Why Does My Cat Eat My Hair? Pica and Chewing Explained
Creator: Dr. Zubair Khalid

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-10-03

Why does my cat eat my hair? In most cases, it is a form of pica, which means eating something that is not food. Pica toward fabric, wool, and hair is common in cats, especially young ones, and it can be harmless or a sign of stress or an underlying medical problem [1]. This article is educational and is not a substitute for veterinary diagnosis or treatment.

Quick Answer

Pica toward one or more non-food materials was reported in 42.9% of cats at about 6 months old, 32.0% at 12 months, and 30.9% at 18 months in one UK cohort study [1].
Hair eating is often a grooming or stress-related behavior, but it can also be linked to chronic gastrointestinal disease [2].
Swallowed hair usually passes, but clumps can form a blockage that needs emergency care.
Redirect your cat to safe chew toys, add daily play and puzzle feeders, and keep hair ties and brushes out of reach.
See a veterinarian if hair eating starts suddenly, comes with vomiting or appetite loss, or your cat seems uncomfortable.

Why Does My Cat Eat My Hair?

Hair eating sits under the umbrella of pica, the term for eating non-food items. Pica is not one condition. It is a behavior that can have several different drivers, and the same cat may have more than one.

Normal grooming and curiosity

Cats groom themselves and their housemates constantly. Loose hair on your head, a brush, or a pillow can look like something to investigate with the mouth. Kittens explore the world by mouthing and chewing, so a kitten eating hair is often doing what kittens do. Some cats also seem drawn to the texture or smell of hair, especially hair with shampoo, conditioner, or styling product on it.

Stress and environment

Stress is a well-recognized trigger for pica. In one cohort study, cats that moved to a new house between about 6 and 12 months of age had higher odds of chronic pica, meaning the behavior showed up at all three study timepoints [1]. Living in a rented home and living in a household without a dog during early kittenhood were also linked to higher odds of chronic pica in that study [1]. These findings do not prove cause and effect, but they suggest that early environment and household change matter.

A case report of a 14-month-old cat described pica toward wool and fabric alongside aggression, and both problems got worse after an international relocation [3]. When the cat was started on the selective serotonin reuptake inhibitor fluoxetine, the owners reported significant improvement in all behavioral signs after 6 weeks [3]. That is a single case, so it does not mean medication is right for every cat, but it shows how strongly stress and pica can be connected.

Boredom and understimulation

Cats are built to hunt, stalk, and problem-solve. A cat with little to do may redirect that energy into chewing hair, fabric, or other household items. This is one reason why indoor cats with few toys or no daily play often show more oral behaviors.

Sensory and feeding factors

Feeding motivation in cats is influenced by smell and novelty. In a study of twelve cats, repeated exposure to the same food odor reduced how much they ate across feeding cycles, while offering different foods increased total intake [4]. This does not directly explain hair eating, but it does show that cats are sensitive to sensory variety around food. Some owners notice more hair chewing when a cat seems unsatisfied with meals or mealtimes are predictable and rushed.

Medical causes

Pica can be a clinical sign instead of a stand-alone behavior problem. In a review of 133 dogs and cats who had gastric foreign bodies removed endoscopically, all 41 animals that had gastrointestinal biopsies showed histologic chronic enteritis, and 80% had chronic gastritis [2]. Helicobacter bacteria were found in 49% of the biopsied animals and were positively associated with how severe the gastric inflammation was [2]. In other words, a significant number of animals with pica and foreign bodies had ongoing gut disease [2]. That does not mean every hair-eating cat has gut disease, but it does mean a veterinarian should consider it.

Other medical possibilities include dental pain, anemia, hyperthyroidism, and neurologic conditions. Your veterinarian can decide which tests are appropriate.

Why Is My Kitten Eating My Hair?

Kittens are the most likely group to show pica. In the UK cohort, pica was reported in 42.9% of cats at about 6 months old, then dropped to 32.0% at 12 months and 30.9% at 18 months [1]. Many kittens simply outgrow the behavior as they mature.

That said, a kitten eating hair still deserves attention. Young cats are smaller, so a hair clump or a swallowed hair tie can cause a blockage faster. Kittens also have less predictable eating habits, and a sudden change in appetite or energy should be checked.

If your kitten is also eating litter or licking walls, those behaviors can point to mineral deficiency, anemia, or stress. You can read more about that pattern in Why Is My Cat eating litter? Pica Mineral Deficiency and Stress.

When Hair Eating Becomes a Problem

Hair eating is a problem when it causes harm. Watch for these signs.

Your cat swallows large amounts or pulls hair out to eat it.
Hair eating happens daily or replaces normal play and eating.
Your cat vomits, retches, drools, or stops eating.
Your cat has diarrhea, constipation, or a painful belly.
Your cat loses weight or seems tired.
Your cat also chews wool, fabric, plastic, or string.

Swallowed hair usually moves through the digestive tract. A large clump can form a trichobezoar, which is a hairball that does not pass. This can cause a partial or complete intestinal blockage. A blockage is a surgical emergency. Signs include repeated vomiting, no appetite, lethargy, and a hard or tender abdomen.

If your cat is losing hair or over-grooming at the same time, the hair eating may be part of a bigger skin or behavior issue. See Why Is My Cat Losing Hair? and Why Is My Cat pulling out fur in clumps? Psychogenic Alopecia and Over-Grooming.

What to Do Step by Step

1. Book a veterinary exam first

Before you treat this as a behavior problem, rule out medical causes. Your veterinarian will ask when the behavior started, what your cat eats, whether there have been changes at home, and whether there are other signs like vomiting or weight loss. Blood work, fecal testing, and imaging may be recommended. If chronic gut disease is suspected, further testing or referral may follow [2].

2. Manage the environment

Put hair ties, bobby pins, brushes, and combs in closed drawers.
Cover or tie back your hair when you sleep if your cat targets it at night.
Pick up loose hair after brushing your own hair.
Keep yarn, string, tinsel, and fabric scraps out of reach.
Offer safe alternatives like cat grass, silvervine sticks, and food puzzles.

3. Add daily play and enrichment

Two short play sessions a day with a wand toy can reduce boredom. Rotate toys so they stay interesting. Puzzle feeders and scatter feeding make mealtime more engaging. Cats also benefit from vertical space, window perches, and scratching posts.

4. Change how you feed

Because cats respond to food novelty, offering a variety of textures or flavors within a complete and balanced diet may help some cats feel more satisfied [4]. Do not switch foods abruptly. Ask your veterinarian before making major diet changes, especially if your cat has a sensitive stomach.

5. Use redirection, not confrontation

When your cat starts chewing your hair, calmly offer a toy or a treat instead. Reward the behavior you want. If your cat is on your lap and starts mouthing your hair, set them down gently and give them a chew toy. Consistency matters more than intensity.

6. Consider stress reduction

If there has been a move, a new baby, a new pet, or a schedule change, give your cat extra hiding spots, quiet time, and predictable routines. Pheromone diffusers help some cats. A certified behavior professional can build a plan if the behavior continues.

7. Ask about medication

In the case report described earlier, fluoxetine was used after behavior and environmental changes, and the cat improved after 6 weeks [3]. Medication is not a first step for most cats. It is a decision your veterinarian makes based on your cat's health, age, and other treatments. The dose is calculated from your cat's weight and health, so never use a medication without a prescription.

What Not to Do

Do not punish your cat. Yelling, spraying water, or tapping the nose can increase stress and make pica worse.
Do not assume it is just a phase. Kittens often outgrow pica, but adults who start eating hair need a checkup [1].
Do not give human hair supplements or vitamins without veterinary guidance.
Do not use home remedies for blockages. If you suspect a blockage, go to a veterinarian right away.
Do not rely on hairball paste to prevent hair eating. It may help hair pass, but it does not treat the cause.

When to Involve a Veterinarian or Behavior Professional

Call your veterinarian if hair eating is new, frequent, or getting worse. Call sooner if your cat is vomiting, not eating, or acting painful. A certified applied animal behaviorist or veterinary behaviorist can help when medical causes are ruled out and the behavior continues.

If your cat is also licking walls or floors, that can be a separate pica pattern. See Cat Licking Walls or Floors: Pica or Medical Issue?. If your cat is itchy and losing hair, see Why Is My Cat So Itchy?.

Limitations and When to Contact a Veterinarian

This article cannot tell you what is causing your cat's behavior. Only a veterinarian who examines your cat can do that. Individual cases need a veterinarian, and the advice here is general.

Contact a veterinarian the same day if your cat:

Vomits more than once or cannot keep water down.
Stops eating or drinking.
Seems painful when you touch the belly.
Has diarrhea with blood or black stool.
Is straining to defecate with no stool produced.

Go to an emergency clinic now if your cat:

Collapses, breathes hard, or has pale gums.
Has a swollen, hard, or tender abdomen.
Is retching without producing anything.
Has swallowed a hair tie, string, or large clump of hair.

Schedule a routine visit if your cat:

Eats hair most days.
Has a sudden change in behavior or appetite.
Loses weight or has a dull coat.
Has been eating hair for more than a few weeks.

Frequently Asked Questions

Is it normal for cats to eat hair?

Hair eating is common enough that it is considered a normal variant in some cats, especially kittens. In one cohort, pica toward at least one material was reported in nearly 43% of cats at about 6 months old [1]. The behavior becomes abnormal when it is frequent, causes symptoms, or replaces normal eating and play.

Can hair eating cause a blockage in my cat?

Yes, swallowed hair can clump into a trichobezoar and cause a partial or complete intestinal blockage. A blockage is an emergency and often needs surgery. Signs include repeated vomiting, no appetite, lethargy, and a painful belly. If you see these signs, go to a veterinarian right away.

Why does my cat chew on my hair but not eat it?

Chewing without swallowing is often exploratory or stress-related. Your cat may like the texture, smell, or the attention it gets. It can still be a problem if your cat swallows pieces or if the behavior is constant. Redirect to a toy and reward calm behavior.

Should I change my cat's food if they eat hair?

Not without veterinary advice. Some cats seem more satisfied when they get sensory variety in their diet, and food novelty can affect feeding motivation [4]. But a diet change can cause stomach upset, and your veterinarian needs to rule out medical causes first. Ask before switching.

Do cats grow out of eating hair?

Many kittens do grow out of pica as they mature. In one study, reported pica dropped from about 43% at 6 months to about 31% at 18 months [1]. If the behavior continues into adulthood or gets worse, it deserves a veterinary workup.

References

Owner-Reported Pica in Domestic Cats Enrolled onto a Birth Cohort Study. Animals : an open access journal from MDPI, 2021.
Pica as a clinical sign of a chronic enteropathy in dogs and cats. Journal of the American Veterinary Medical Association, 2025.
Human-directed aggression and pica in a 1-year-old cat, which worsened following international relocation. JFMS open reports, 2023.
Olfactory habituation and dishabituation dynamically regulate feeding motivation in domestic cats. Physiology & behavior, 2026.