What Are Hairballs?
Hairballs (technically called trichobezoars) are clumps of swallowed fur that accumulate in a cat's stomach and are eventually vomited up. Despite the name, they're rarely ball-shaped — they typically look like a cylindrical, tube-shaped mass of matted hair, often mixed with digestive fluids.
While occasional hairballs are a normal part of cat life, frequent or severe hairballs can signal an underlying issue that needs attention.
Why Do Cats Get Hairballs?
Cats are meticulous groomers. Their tongues are covered in tiny backward-facing barbs (papillae) that catch loose fur during grooming. Most of this fur passes through the digestive system without issue. However, some fur accumulates in the stomach and forms a hairball that the cat must expel by vomiting.
Factors that increase hairball frequency:
- Long-haired breeds — Maine Coons, Persians, Ragdolls, and Himalayans shed more and groom more
- Excessive grooming — stress, skin conditions, or allergies can cause over-grooming
- Shedding seasons — spring and fall shedding increases fur ingestion
- Age — older cats tend to groom more efficiently and may develop more hairballs
- Low-fiber diet — fiber helps move fur through the digestive tract
What Does a Normal Hairball Look Like?
A typical hairball episode involves:
- Retching, gagging, or hacking sounds (often alarming to new cat owners)
- Vomiting up a cylindrical mass of fur, sometimes with food or bile
- The cat returning to normal behavior immediately after
Occasional hairballs (once every week or two) are generally considered normal for cats who groom regularly.
When to Be Concerned
Contact your vet if you notice:
- Frequent hairballs — more than once or twice a week
- Retching without producing a hairball — could indicate a blockage
- Loss of appetite combined with hairball symptoms
- Lethargy or bloating alongside retching
- Constipation or diarrhea — may indicate fur is moving through the intestines
- Blood in vomit — always warrants immediate veterinary attention
In rare cases, a hairball can cause a life-threatening intestinal blockage that requires surgery. Don't ignore persistent symptoms.
How to Prevent Hairballs
1. Regular Brushing
The most effective prevention is removing loose fur before your cat can swallow it. Brush your cat 2–3 times per week (daily for long-haired breeds). This dramatically reduces the amount of fur ingested during self-grooming.
2. High-Fiber Diet
Dietary fiber helps move ingested fur through the digestive tract before it can accumulate. Look for:
- Cat foods with added fiber (beet pulp, psyllium, pumpkin)
- Hairball-formula cat foods specifically designed to reduce hairball formation
- A small amount of plain canned pumpkin (not pie filling) as a fiber supplement
3. Hairball Remedies
Over-the-counter hairball gels and treats (typically petroleum jelly-based) lubricate the digestive tract to help fur pass through. Use as directed — overuse can interfere with nutrient absorption.
4. Increase Hydration
A well-hydrated digestive system moves fur more efficiently. Feeding wet food or adding a cat water fountain can help.
5. Reduce Stress-Related Over-Grooming
If your cat grooms excessively due to anxiety, address the root cause. Environmental enrichment, pheromone diffusers, or a vet consultation may help.
Hairball-Prone Breeds
- Persian — dense, long coat requires daily grooming
- Maine Coon — thick, semi-long fur and heavy shedding
- Ragdoll — silky long coat that mats easily
- Himalayan — similar to Persian; high grooming needs
- Norwegian Forest Cat — thick double coat, seasonal heavy shedding