Quick answer: Fiber is commonly used in hairball-control diets because it can help move swallowed hair through the gastrointestinal tract. But “more fiber” is not automatically better, and frequent hairballs still need the underlying cause considered.
How fiber fits into hairball management
VCA notes that diets with higher fiber are sometimes used to help move swallowed hair through the gastrointestinal tract instead of allowing it to accumulate.
Food versus supplement fiber
Hairball-control foods may include fiber as part of the complete diet. Supplements may also contain fiber or other ingredients. These approaches are not automatically equivalent, so compare the full label and total diet.
What to check on a fiber-containing hairball product
- Is it intended for cats?
- What type of fiber or plant ingredient is included?
- How much is provided per serving, if disclosed?
- Does it duplicate another fiber supplement?
- Are serving directions and cautions clear?
Fiber does not replace evaluation of frequent vomiting
If your cat is vomiting often, losing weight, eating less, straining to pass stool, or showing pain or lethargy, do not keep increasing fiber without veterinary guidance.
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Sources
Written by the PetVibess Editorial Team. General educational information only. Updated October 8, 2026.