Hi There, I have lice on my hens. There is so much advice and responses that seem like friendly advice. I hate to start yet another thread on same topic but I really hope for advice that is more tried and true then just an assumption. I certainly don't wish to kill the hens, but I really don't want them to suffer from the lice. I can live with a withholding period. I would rather not pay a hundred plus dollars but I do want something that works and is safe. I covered their heads with cloth to keep dust out and then put DE on them. Seemed to make a huge difference but didn't last. I went to Walmart and a few other local stores and tried to buy Sevin but can't find it anywhere. Is it no longer available? In it's place is something called "Worry Free". Does anyone know anything about this product and will it work like Sevin? http://www.worryfreebrand.com/ I bought the Manna Pro Poultry Protector but thought it couldn't be sprayed on the birds so I cleaned and sprayed their coop. Not sure it did much. Maybe I was supposed to spray the birds? In any case, I want an effective solution. Not the most expensive, necessarily. Unless only the $142 bottle of Elector PSP is the best or only real solution. I would buy it if that's what I need. But I only have 9 chickens and it seems excessive. Thanks in advance for your home-tested advice!