zacman, if your chicks are under broody hens you can just dust the hens. The chicks will get some of the dust on them from the hens.
And welasharon is right, mites and lice can kill chickens, especially broodies and chicks. If you do the dusting at night, and keep things quiet and calm, your...
I just use poultry dust (permethrin) from the co-op. This works on lice and mites. After reading the research suggesting a link between respiratory problems and turning hens upside down, I have chosen to dust them "right side up;" I wait until they perch in the evening, pull on some surgical...