Has anyone actually used DE and gotten sick from it? Or their birds? (Sorry for hijacking the thread

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I use DE and have never had an issue. No illness, no adverse effects.
I create a mash for my chickens consisting of moistened pellets, Terramin clay, DE, whole eggs mashed up. I sometimes add mealworms or black soldier fly larvae, or different herbs, or greens,... whatever I happened to have available. Usually about once a month. My chickens love this and helps to keep their poo consistent, helps with runny poo. I also offer wet sand for bathing. I buy 50 lb bags of play sand at Home Depot for this. The sand cleans their feathers, feet, conditions their skin. Never have any mite issues. I adopted a hen many years ago, a white Sussex, Bernadette. I suspected mites on her. I put a small drop of 1% injectable ivermectin on the back of her head, in the nape. Problem solved. I have read you can give this orally for internal parasites, but I've never had to do that. The DE and clay take care of that.
A sidebar: I always have ivermectin on hand. A drop on the back of the neck for guinea pigs takes care of mites. Rabbit ear mites, flush and clean ears well, douse with oil (coconut, olive), drop at the base of the ears, or forego the oil in the ears, and put a drop of ivermectin per ear. I use it for my dogs, 0.1 ml per 10# of body weight. Off label. Once every 3-4 weeks. Takes care of heartworm, intestinal parasites, even fleas! I have never seen a flea on any of my dogs, nor do biting insects even land on their fur with this regiment. Of note, the MDR1 gene and ivermectin sensitivity/toxicity. I have a rough collie who tested positive for the MDR1 gene and she is on a different protocol. While small doses are reportedly OK, for heartworm prevention, I use it for parasite control as well, and the dose is significantly higher. Bottom line is to do your research carefully and stay informed (
https://vcpl.vetmed.wsu.edu/).