Diatomaceous Earth Benefits for Pets

I use diatamaceous earth (or dirt as I affectionately call it) with all my animals. I have horses and cattle who get 1oz/day in the spring and fall and 2oz/day in the summer to help with fly control. The nice side benefit is I also have less problems with parasites when they are on this. I also give it to my pigs, goats, sheep, chickens, geese, alpacas, dogs, and cats. it works great and the farrier even comments on how little pest problems we have compared to other farms, which is nice to have few flies with all the animals. Also because of the effect on parasites and our local weather I only have to strongly deworm about 2x per year instead of deworming every 8 weeks for the horses and such.