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Why Fish is Dangerous for Cats

Toxins, heavy metals, and other concerns with feeding fish-based diets to cats

Mar 31, 2026
∙ Paid

Most people think fish is a natural food for cats. It’s been promoted that way for years. But it really isn’t.

Cats evolved as desert animals. Their natural prey is rodents, lizards, insects, and birds, not fish. While many cats love the taste, fish comes with real downsides that don’t get talked about.

1. Environmental toxins and contaminants

Fish don’t j…

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