[Dog_Obsessed]

Here is some information about inhaling DE: http://www.deq.state.or.us/er/docs/LowerBridge/DiatomaceousEarthFactSheet.pdf
It only talks about humans inhaling DE, so I am not sure about pets. I have heard that you can give it orally for prevention/elimination of worms, but I think it would be more effective when used externally for flea and tick prevention.

I can’t use it, because I am allergic to dust and have sensitive lungs, but I have heard that people have had good results with it.