Overview
Some owners ask: can cats eat natto? The short answer is that it’s not toxic, but it’s also not a good food for cats.
Natto is a fermented soy product made for people, not animals.
Is natto safe for cats?
A very small amount of plain natto is unlikely to be dangerous.
That doesn’t mean it’s suitable or helpful for cats.
- Tiny amount: usually not toxic
- Regular feeding: not appropriate
- No nutritional benefit for cats
What is natto?
Natto is fermented soybeans.
It has a strong smell, sticky texture, and is often eaten with seasonings.
- Soy-based food
- Fermented
- Designed for human diets
Why natto isn’t good for cats
Cats are obligate carnivores.
Plant-based and fermented foods don’t match their needs.
- Harder to digest
- Can cause stomach upset
- Sticky texture may be unpleasant
- Adds no value to a cat’s diet
What about seasoned natto?
Most natto is served with added ingredients.
- Soy sauce (high salt)
- Mustard or spices
- Sauces and flavor packets
- These make natto unsafe for cats
Possible risks of feeding natto to cats
Problems are more likely with larger or repeated amounts.
- Vomiting or diarrhea
- Gas or stomach discomfort
- Refusing normal food
- Extra salt intake from seasonings
How much natto can a cat eat?
| Cat size | Amount | How often |
|---|---|---|
| Any size | Tiny lick or bite | Very rarely or avoid |
Better alternatives to natto for cats
If you want to share food with your cat, choose cat-appropriate options.
- Complete cat food
- Cat-specific treats
- Plain cooked meat
- Freeze-dried meat treats
Can kittens eat natto?
No. Natto is not suitable for kittens.
What if my cat ate natto?
If your cat licked or ate a tiny amount, it’s usually fine.
- Remove access to more natto
- Offer fresh water
- Watch for stomach upset
- Vomiting or diarrhea continues
- Large amount was eaten
- Seasoned natto was consumed