Though this substance is considered nontoxic to people and pets, it doesn’t mean that using diatomaceous earth for dogs is without risk. For instance, you should avoid applying the product directly to a dog’s skin because it can irritate their eyes, skin, and respiratory system, she says.

Will diatomaceous earth hurt my dog? It is possible. While many claim it’s completely safe, this isn’t backed by science or most vets. There aren’t any current studies about using diatomaceous earth on dogs, so we can’t know what the side effects will be.

Diatomaceous earth can be used on dogs as a means of flea and tick control. The powder is safe to use on dogs, but should not be inhaled by them. Also, ensure that you are ONLY using ‘food grade’ versions of Diatomaceous Earth as the ‘filter grade’ Diatomaceous Earth can be harmful to your dog.

DE is extremely fine and can cause severe issues if anyone, including pets, breathes it in. The powder is breathed into our lungs but cannot be quickly expelled, which can cause a similar effect to anaphylaxis in people and pets with asthma and other breathing difficulties. In dogs with respiratory issues, diatomaceous earth could be fatal.

Diatomaceous earth may be safe for your dog to eat in small amounts, but it isn’t necessarily the best thing for them to breathe in. It may also cause irritation of the nasal passages, eyes, and skin. Diatomaceous earth exists in two forms; the amorphous and crystalline form.