Diatomaceous earth is the skeletal remains of diatoms or single celled algae. The skeletons are made of silicon or glass. The way diatomaceous earth works is by cutting open the skeleton or outer covering of an insect and either kills it directly or allows a chemical, that is mixed with the diatomaceous earth, to enter the insect thereby killing it. I would not recommend using this on or near your pets. There are safer methods of caring for your pets (and I’m a true believer in better living through chemicals – when necessary).
-Andy