Thanks V,
   
  That's what I paid for the 8 lb bag at the feed store.  I haven't seen any 
evidence of anything wrong after using the fs source so I'll continue using it  
 I don't mind giving some away for flea powder to my neighbors that way and it 
certainly hasn't hurt my dogs and cats.  THis is the first that I've even heard 
of food grade DE.
   
  One of the reference sites says that if you have eaten anything made with 
wheat flour you have eaten DE.  Apparently because it is used an an insecticide 
in the grain storage facilities.  At $1.50/oz I seriously doubt that they are 
using food grade for a silo of grain.
   
  I'm going to have to read a lot more to find out just when/where/why the DE 
is heated and how much.
   
  Thanks, Bill Keen

V <[email protected]> wrote:
  Hi Bill,

I got food grade DE here at this site.

http://store.yahoo.com/herbal-remedies-usa/diead6oz.html