Need Help Treating New Birds

[The Egg Bandit]

Hi y'all! My neighbor is experiencing financial difficulties over her feed bill and is letting me have some of her flock. The thing is: some of the chickens have leg mites. I am setting up a separate quarrantine pen for all these birds, which will later contain rabbit hutches and a vegetable garden. What would be the best treatment to use? And how long to withhold eggs/meat? She is suggesting a Malathion dip for their feet, but I get drastically ill every time I even smell a hint of Malathion, and really don't want to contaminate the soil. If I were to dust them with Permethrin, would that do the trick? I intend to keep them from my clean flocks for at least 30 days after treatment.
Thanks so much for your help!

 

[peaceful]

Would food grade diatomaceous earth work for leg mites as an option? I don't know. It's supposed to kill all little bugs from the miniscule sharp edges, and is non-toxic. Here are links
http://www.preciouspets.org/diatomaceousearth/
http://www.dirtworks.net/Diatomaceous-Earth.html
http://video.google.com/videoplay?docid=867362921535089214#