from my research, it will not stop an infestation of lice. you need to eradicate them. I used Sevin, and Sevin is suggested by every ag extension i've been able to find that has given suggestions for lice control in poultry.
as far as using it internally- it works by cutting the organism and then sucking the moisture out of it (like a desiccant). by putting it in a moist environment, it would be like trying to use a water-saturated sponge to suck the moisture out of a puddle of water. yes, if it was dry it would absorb moisture, but now that it's wet, how is it going to absorb anything?
once you've got your lice under control, it may help with prevention. however, how do you know if you're preventing something you cannot see? i'll sell you this amulate you can use to protect you from oxygen toxicity, for $1K! it works, really! O2 toxicity can cause blindness!! don't miss out!
sure, if you get another infestation, you could say it doesn't work. however, if you
don't have a lice problem again, does that mean it
IS working? or does it mean that you have controlled your lice situation and haven't done anything to bring more in?
i blame mine on some hay that mice had been living in over winter (OMGosh you wouldn't believe the mice)(btw, i didn't realize it was this same hay when i used it; found out after i used it, that it was the hay with all the mice). now that i'm not using the hay, i don't and shouldn't have a problem. is that due to the fact that i am now using DE, or is it due to the fact that i stopped using what was causing problems for my birds?
it may work, but i can't see the lice coming down the driveway, seeing the DE, turning up their noses and leaving. i can see how it could help if the birds are provided a dusting box full of it.
i'm obviously not going to test, because i am not interested enough in knowing if DE works, to infest my birds with lice again
now, about that amulate. interested? (yes, there is such a thing as O2 toxicity)
(more than likely, you will never experience it, though)
oh, and it dries your hands out, but it feels so soft, like corn startch!