The fact that they are pullets should not matter when using the dust. I have not used the Frontline, but I have a friend who does. I'd use one drop on top of the neck as opposed to the two suggested by most people because they are smaller birds. If you have the dust, use the same method as...
Those are lice eggs. Couple of things to do right away. First, don't panic--it is totally curable, just a bit of a pain. Diatomaceous earth is a wonderful preventative, but really not strong enough once there is an infestation. Sevin has been banned for poultry use, although many use it. I...