Quote:
For those who are new to this mite/lice issue, sprays and dips do not kill the eggs. You can treat one day and have live bugs the next day even if the treatment killed all the living bugs the day before. It's frustrating, but that is why you need to re-treat. You have to treat repeatedly, before the newly-hatched bugs can lay another round of eggs. How soon you need to re-treat will depend on which critters are infesting your chickens, how long they live before laying eggs, and how long the eggs take to hatch.
None of this really works long-term for roost mites. Roost mites live on the roosts and in crevices on the premises, and come out to chomp on your birds when your birds go to roost in the evening. For lice, northern fowl mites, and other mites that live on the birds you have to treat repeatedly until you have killed all of the critters that hatch out from the already-laid eggs and there are no more eggs to hatch. If you miss a treatment and some of those bugs lay another round of eggs you get to start over again.
I've avoided Frontline because I eat my birds and that stuff scares me more than the permethrin. It sticks around way too long. Fortunately I don't have as many chickens as you, so spraying once a week only takes about 15 minutes and I get to know my birds really, really well. Too well. "Hi girls, time to check your butts." Only another chicken-owner would understand...
Short story is yes,