Hi all, I am new to Chazhound. I am having a fly problem (My new schnauzer pup goes in a fairly small wooded bushy private courtyard) I clean as best I can but the flies are noticebly worse. There is a dog next door too. Has anyone had any experience with Diatomaceous earth as both a food additive and spread around areas to help with flies. I have read that it passes right thru in digestion and when it is in the feces it kills the larva of flies and the flies themselves by causing them to dehydrate AND it is totally non toxic!!! Is it too good to be true?