4yearsofchickens
Songster
I know that this thread is very old but I stumbled on it asking the same thing in the search engine It's kinda expensive to buy, so I wanted to make sure it's useful. I see a lot of people here saying it does nothing esp in humid environments, but I do want to say that last year I had a massive poultry lice infestation. Like, they were losing feathers and not laying(not a molt). I bought DE and would dump it on the backs of my chickens: a few weeks later, no lice. At all. That may be a coincidence I don't use it as a preventative, only when I see a problem. My chickens are lice free and I didn't have to buy any sprays. I'm not a scientist so I can't give any info there though sorry I know this is old news but I wanted to give my thoughts ( I'm not at all against sprays or anything like that. I also live in a very humid place)