www.dogcatsupply.com

1.5 lb. Diatomaceous Earth is a naturally occurring fine powder composed of crushed fossils. This remarkable substance is a sharp-edged desiccant - used externally it pierces the waxy outer shells of fleas and ticks causing dehydration.  -Organic alternative for flea, tick and parasite control  -Effective natural wormer  -Food Grade, Made in the USA.External Application: Massage into pets' coat, avoiding eyes and nose. Sprinkle around pet bedding as a further deterrent. Allow up to 72 hours for results. Safe to use weekly or as needed.