I forgot something...she sometimes suffers what appears to be vent fleet, which either precipitates the whole thing or comes on after so besides antibiotic I also give her an anti-fungal (Nystatin).
I habe a hen that I've had to treat for flystrike every year for years (she's actually 14 yrs old now). I wear nitride gloves and get to removing maggots with fingers and tweezers as needed. The vent is usually red at the top so I gently wash her vent area using betadine solution or dilute...
