1.0Dog Food Advisorhttps://www.dogfoodadvisor.com/forumsJeffreyhttps://www.dogfoodadvisor.com/forums/author/jeffrey-dubinskygmail-com/| Dog Food Advisorrich600338<blockquote class="wp-embedded-content" data-secret="IRQDHukJR8"><a href="https://www.dogfoodadvisor.com/forums/reply/63800/">Reply To: Diatomaceous Earth</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.dogfoodadvisor.com/forums/reply/63800/embed/#?secret=IRQDHukJR8" width="600" height="338" title="“Reply To: Diatomaceous Earth” — Dog Food Advisor" data-secret="IRQDHukJR8" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript">
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I’m not sure about the frequency but i can tell you that diatomaceous earth only works when dry. Once it becomes wet it no longer has the properties to kill the fleas because it loses its crystal structure that punctures the fleas exoskeleton which dehydrates and kills them.