My red star hens abdomen has been red and swollen for the past three days. Her vent and abdomen are red and can be seen straining. I tried to feel for an egg, but didnt feel anything. She has stopped trying to leave the coop an now just sits down all day with her eyes closed. She also has yellow liquid coming out of her vent. She was eating when this started but has since stopped. Does anybody know whats wrong with her ? Can she be helped or is it best to just put hee down ?