I have two hens that are about 5 months old who have diarrhea and aren't looking as energetic as before. Still scratch and go crazy for food. Drinking plenty of water but seem to be laying down more than usual. I took those two out and monitoring them. Today I noticed one has a terrible looking "vent" and all around area.. Never had this issue before.. Non of those age have started laying.. So not sure what has caused this .