Some say 7-10 days between dusting for lice, others say 14 days... ?

[Jenbirdee]

what is the actually life cycle and egg laying cycles of lice on chickens? I have done 2 treatments , 8 days apart, so far.

 

[dawg53]

I normally do a second dusting 7-10 days after the initial dusting.
Here's a link with more info:
https://anrcatalog.ucanr.edu/pdf/8162.pdf