Fish-based pet food may expose cats and dogs to forever chemicals

By Christa Lesté-Lasserre | New Scientist | February 20, 2026

Read the full article by Christa Lesté-Lasserre (New Scientist)

"Many pet foods – especially those based on fish – have levels of so-called forever chemicals that exceed European health agency thresholds for humans.

The findings point to an urgent need for increased monitoring of contaminants in pet products and a better understanding of risks to companion animals, says Kei Nomiyama at Ehime University in Japan.

“Our findings do not indicate an immediate health emergency, but they do highlight a knowledge gap,” he says. “Pet owners who wish to reduce potential exposure may consider paying attention to ingredient composition and diversifying protein sources.”