Lots of people are ignorant and NONE of them will get before and after
fecal floats to back their claim, no matter how many times I ask or even offer to pay half for the tests.. Studies show DE is ineffective when wet... like everything inside the body/digestive system.
https://en.wikipedia.org/wiki/Diatomaceous_earth
Pest control
"Medical-grade diatomite has been studied for its efficacy as a
deworming agent in cattle; in both studies cited the groups being treated with diatomaceous earth did not fare any better than control groups"
"
Use in agriculture[edit]
Natural freshwater diatomaceous earth is used in agriculture for grain storage as an
anticaking agent, as well as an insecticide.
[24] It is approved by the Food and Drug Administration as a feed additive
[25] to prevent caking.
Some believe it may be used as a natural
anthelmintic (dewormer), although studies have not shown it to be effective.
[16][17] Some farmers add it to their livestock and
poultry feed to prevent the caking of feed.
[26] "
DE is an over rated, dangerous, FALSE sense of security that is NOT welcome at my house EVER. If you wanna know the TRUTH about YOUR parasite load... get floats done a couple times per year to see where YOU stand. After seeing signs folks SWEAR is worms... fecal floats say it wasn't and I have YET to need to treat for internal parasites at MY location, with MY wildlife and livestock loads, weather conditions, etc... in my chickens or dogs or pigs. Since it cost me about $25 per float... I bought my own microscope to do my own floats. I have not yet had to with hold any eggs or waste time treating what I don't have.. all thanks to one simple test that tell the REAL (microscopic) story since only large round worms will ever be seen in dropping and all others stay inside with only their microscopic eggs passing in feces.
No, that's NOT gape worm... looks like your hen is burping. Gape worm will be gasping with every breath.
If and when you decide to treat for parasites... always treat ALL birds in the flock... as other may simple not be showing symptoms yet... and you NEED to prevent any resistance being built to the drug by the parasite so it does work when needed.
https://the-chicken-chick.com/the-cut-dry-truth-about-diatomaceous/
https://the-chicken-chick.com/diatomaceous-earth-de-benefitrisk/
Hope this is helpful and informational!