<p>A Basset hound.</p>

A Basset hound.

Photograph by Joel Sartore, National Geographic Photo Ark

Can Dogs and Cats Be Vegan? Science Weighs In.

Treats and kibble made with fungus offer high protein from plant-based foods, but not all pets may be able to make the switch.

Quick, name one thing soy sauce, miso, and sake all have in common. If you said, They’re delicious, you’re not wrong. But the real answer is koji.

The common name of the fungus Aspergillus oryzae, koji is a microorganism at the heart of many traditional Asian flavors and foods. It’s also the key ingredient in a new kind of pet food announced today that its creator hopes could change the future of how animal feeds are produced.

Koji is normally cultured directly on grains like rice, which supply the starches the fungus needs to proliferate. Wild Earth co-founder Ryan Bethencourt says they put the koji straight into a beet sugar-based solution. After extraction, they press it like tofu, then slice

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