I have two red stars and three barred rocks. One of my reds was looking a bit mangy back in late December, when I took a closer look I could see whitish grey eggs in the white down of her feathers. Couldn't see anything on her at all, checked her in the day and at night to be sure. So I've been dusting her and the others too just in case. I couldn't find Sevin dust up here around Ottawa but I found a flea and tick powder for dogs that has 5% Carbaryl which is the active ingredient in Sevin so I figured it would work. I also cleaned the coop out several times since then and put down generous amounts of food grade DE on the floor, roosts, nesting boxes etc etc. And I added a sand box with some DE in it for good measure. I don't see any eggs on the other chickens, just this one red. And she still has egg sacks? Are they dried up from the powder and will eventually go away? OR are they still laying eggs on her somehow? She's not acting sick, eats, drinks, etc, I get almost an egg a day from her. The only thing I notice is she twitches her head alot, like something is bugging her. And she's lots quite a few feathers. Some on the back of her neck, some on her lower breast, and on her shoulders (do chickens have shoulders?? ) Should I change my approach or just keep on keeping on?