I used to raise tropical fish and we use diatomaceous earth in our filters to kill parasites. The point of using it is that the diatom skeletons (which look like white powder to us) are spiky balls that pierce and kill small organisms. It is successful in clarifying water as well since a clump of it, even moist or completely saturated, will create a filter due to the spikes creating a mesh to trap particulates. It is also used in pool filters for this reason and creates a superior water clarity and slight ph buffer. I hadn't thought of using it with the chickens. Thanks! I'm not so sure how quickly the digestive juices break down the diatomaceous earth and I'm sure the quality matters. The stuff for pool filters is usually infused with chlorine, although we used to dechlorinate it by soaking it in water and rinsing it, also there are chemicals we use to remove chlorine. I don't know where you get the other kind, it is hard to find, even for pools nowadays.
I picked up a bottle of piperazine wormer at the feed store, it was cheap, like 7.50 and I used a quarter teaspoon for a gallon of water for 13 chickens, per my feed store owners guidance, we are big in commercial poultry where I live, and backyard, nearly everyone has chickens or had them. The great thing is that I can also use this on my dogs and cats and saves me bigtime on money.
I know it won't kill all of them and I will likely have to rotate like I did with my horses. I'm just afraid to use anything that doesn't say its safe for poultry specifically.
We have a bug problem as far as fire ants go, and I feel bad for the chickens since they can't eat them fast enough. The DE is quite effective on this, we use it all the the on fire ant beds. Plain ashes are a good deterrant as well and agricultural lime, bugs don't like powder on their feet and bodies, it adheres to the hairs on them and irritates them so they avoid areas in general where this is spread.