During her regular health check, we found some lice on Fleur. The treatment is easy: Apply 0.01cc Frontline Plus (9.8% Fipronil) per pound to the skin on the neck. She weighs a bit less than 5lb, so we applied 0.05cc (1 drop). We treated the whole flock, and added some diatomaceous earth in their nest boxes and favorite dustbath areas.
Update: We are no longer using Fipronil due to the unknown egg withdrawal period. We are using 0.25% Permethrin dust instead.