Hi, all. I am relatively new to chicken keeping and could use help. I noticed my 2 YO barred rock was losing some feathers but yesterday realized it's really bad - she has lost all feathers around her vent and underside, and is some at the back her neck. As of yesterday she is walking funny - it seems painful - and looks ill. Her vent had some yellow paste coming out. I don't know if it's mites, vent gleet or something else. We soaked her in epsom salt which seemed to give her some temporary relief but I am not sure how to treat since unsure the cause. Hoping to get to the vet tomorrow but she is not doing well. Any and all help is appreciated. I'm very concerned.