7 Best Fiber Supplement for Cats 2026: The Ones Your Cat Will Actually Eat

These dual-texture treats combine a crunchy exterior with a creamy interior, delivering effective hairball control that most cats find highly appealing. Unlike the top pick's plain powder, this treat format is designed for owners who need a palatable solution their cat will actually eat. The fiber blend, including psyllium husk and fish oil, supports digestion and coat health. Most cats accept these treats readily, making daily dosing straightforward.

This option works best for owners of picky cats who have struggled to get their cat to eat powdered fiber supplements. The treat format provides a straightforward alternative, and a 30-day supply offers a convenient trial period to see if it works for your cat.

Two ingredients — drum-dried pumpkin and apple pectin — make up this simple fiber powder that adds soluble fiber to a cat's diet to help firm loose stools and support regular digestion, without artificial fillers or flavorings. The formula is straightforward, and most cats accept it mixed into wet or dry food.

The powder blends into food with minimal effort, and owners report consistent results across a wide range of digestive issues. Because the formula is basic, there's little risk of upsetting a sensitive stomach. However, the pumpkin taste can be detectable by some cats, and a small number will refuse the food.

This powder is best for owners who want a no-frills fiber supplement that works for both dogs and cats. Cat-specific feedback is less extensive than dog owner reports, so it pays to test a tiny portion first. For picky cats that are sensitive to pumpkin flavor, a treat-based or flavored alternative may be a better fit.

The Missing Link Digestion powder pairs dietary fiber with a 7-strain probiotic blend, along with ginger and chamomile for a more comprehensive digestive approach than a simple fiber supplement. The 1lb container keeps the per-serving cost reasonable for households with multiple pets.

This powder suits owners who want both fiber and probiotic support in a single product for their cats and dogs. The downside: the powder can stick to bowl surfaces and needs prompt cleaning to avoid residue buildup, so it requires a bit more attention at feeding time.

This powder provides organic pumpkin, flax seed, ginger, apple fiber, and Jerusalem artichoke in a blend that covers seven distinct fiber sources. The formula mixes readily into wet or dry food with little odor, which owners of smell-sensitive pets will appreciate.

It works best for households where ingredient sourcing matters more than the per-serving price. The $35 jar delivers 90 scoops, but the multi-ingredient mix may not suit cats that turn up their nose at unfamiliar tastes. A small test portion helps avoid wasting the container on a picky eater.

Kin+kind Healthy Poops offers USDA organic pumpkin powder with flaxseed, providing prebiotic fiber to support digestive regularity at a budget-friendly price. The strong odor, however, can be off-putting to some cats, and picky eaters may refuse it. This makes it a practical choice only when the cat tolerates the scent and is not a selective eater.

Fidobiotics Hairball Buster delivers a cat-specific formula targeting hairballs with probiotics, fiber, and omega-3s. The smoked fish flavor, however, has a strong odor that some cats and their owners find unpleasant. Combined with a higher cost per serving than basic fiber powders, this product suits owners who prioritize the added digestive benefits over price and scent.