Low grade, controversial or vague ingredient we usually recommend avoiding
Diatomaceous earth in dog food
Diatomaceous earth (also labelled as diatomite or siliceous earth or by its German name, kieselgur) is a form of soft, highly porous, sedimentary rock made from the fossilised remains of diatoms, a type of hard-shelled algae. In dog food it performs a similar function to charcoal in absorbing toxins in the gut and reducing the incidence of wind. It is also mildly abrasive so it may also help to remove tooth plaque.