Say bye-bye to pesky parasites with the Wholistic Pet Organics Diatomaceous Earth Powder Supplement for Dogs. This non-chemical alternative to chemical dewormers mechanically destroys parasites to help keep your furbaby feeling paw-some. It’s made with the fossilized remains of microscopic seashells called diatoms. You can feed it for internal use, or use it topically to provide relief from pesky biting insects.