i bought a trio buff orpingtons the other day and noticed they had a bad case of scamy leg mites. i started treating the feet when i noticed the chickens were crawling with bugs, when parting the feathers you could see huge clumps off egg cases on the shafts. i promptly dosed all three with ivomec pour on (i used 1.5 ml per chicken?) ive looked today and cant see anyliving bugs but the egg cases are firmly stuck on, i tried bathing one hen but the egg casings didnt budge so am reluctant to try bathing the roo and other hen. they seem so much happier without the bugs, but the eggs cases are everywhere. will these too now be dead or will they die upon hatching? do i have to redose them with ivomec perhaps in a few days?? how can i get these eggs off without plucking the poor chickens bald??