To make a long story short, these are my mother in laws chickens and I don’t not know much about their age or what they eat etc. I noticed one chicken was very lethargic and had a messy bottom. My MIL didn’t seem to concerned but I knew there was something wrong. I got her in a warm tub of water and realized there are maggots in and around her vent and the poop stuck smells awful. I got her in a dog crate because I couldn’t finish washing her as she was freaking out. I don’t know what to do at this point. Please someone help, I don’t want to see her die