So I'll explain my upsetness.
It seems to me there are those who seem to have far to many problems with Coccidiosis and worms and stuff.
AND there is a member who is always pushing drugs and the latest medicated feed for ducks. Another time it was Sevin.
Sevin is a carcinogen. Very dangerous. It not only kills targeted insects but beneficial insects as well . EX. Honeybees.
My opinion is that Diatomaceous earth will work just fine. Properly used of course.
I clean the coop and dust the entire coop,heavy in wet places and corners. I clean and dust all nest boxes. I dump the shavings and then sprinkle heavy with the earth. I clean and oil all roosts and crevices. I dust the birds as well. I have never seen any cooties. This is not to say they're not there, just not sufficient to be epidemic. I also toss some in the scratch can and have never had moths. I also toss some in the feed just because.
Vaseline is good for the birds feet and legs as a prevention for Scaly mites. Bag balm can be used too. Don't wait til you have a problem do this occasionally and you won't.
I believe dark coops are more prone to mites. Here's and example. Nice idea but no natural light. Mites hide in dark damp places. Diatomaceous Earth is also recommended for the house and basements. Treating for Silver fish and other cooties. You can also use it on dogs and cats for flea larvae.
I have put a hygrometer in the coop to monitor humidity. A warm moist coop is a sign that ventilation is not sufficient.
I believe if you have to toss eggs away when using anything it's not safe. Two weeks worth of eggs can amount to 168 eggs for a 12 bird flock. In some cases of course.
I believe there are more organic ways to deal with some problems. That in many cases it's the husbandry that is off, not the birds.
Finally I take issue with those who are constantly pushing what I consider poisons because, I believe those who do so may have a vested interest in pushing this stuff. EX. works for the company that makes these poisons. Their advice is suspect. They prowl these sites plying their trade.
I wish you all safe and healthy poultry keeping.
Rancher, calls 'em as I sees 'em, Hicks.