I also use DE. I agree about the parasite issues--use or not use--up to each person. The main reason I use it is because it does control flies better than anything I have found. My chickens also have less runny poo and seem to lay more when they are on it. I live in the South where the flies are horrible. The flies seem to reproduce in less drastic numbers when my chickens and pigs are ingesting DE. I use the food grade as well. I mix it in their feed in a low concentration and while it may not help them any, it does help decrease the flies. I can't tell it has hurt them in any way. So, I'll continue to use it, at least in the warmer months. Just my opinion.
