Here are some links:
Effect of diatomaceous earth on parasite load, egg production, and egg quality
http://www.google.com/url?sa=t&rct=...RQu6YT8VJEG98UG_w&sig2=-DRxOLMXG8dqTRYJrd4aZg
Diatomaceous Earth for Poultry
http://absorbentproductsltd.wordpress.com/2011/07/21/diatomaceous-earth-for-poultry/
Red Lake Earth is Safe
https://docs.google.com/viewer?
Effect of diatomaceous earth on parasite load, egg production, and egg quality
http://www.google.com/url?sa=t&rct=...RQu6YT8VJEG98UG_w&sig2=-DRxOLMXG8dqTRYJrd4aZg
Diatomaceous Earth for Poultry
http://absorbentproductsltd.wordpress.com/2011/07/21/diatomaceous-earth-for-poultry/
Red Lake Earth is Safe
https://docs.google.com/viewer?
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