I was just closing the coop up and saw one of the hens was just standing there instead of roosting as she normally does. Her rear is very poopy and I grabbed my flashlight and found she is infested with maggots. We had this happen to another hen about a month ago because she seemed to have a prolapsed vent- we didn't realize it until it was too late. She had lain an insanely huge egg a few days earlier and then was acting sick a few days later, and too late I found out what it was (sorry, we are newbies at this.) So we assume it was a prolapsed vent from that egg. However, this chicken tonight who has maggots no longer lays eggs-- she hasn't in months. I can't tell if there are injuries but she has the same symptoms, she has really runny poo and it's oozing out like a blockage- I just am not sure what to do or think. So do maggots come because of an injury only? Could this be worms? I am worried for the rest of the flock. (We have no one in the area who treats chickens so we will be putting her down tomorrow.) I want to make sure I do everything I can to keep the other chickens healthy so again I don't know what's possibly causing this to happen. Thanks for any help.