My hen has really smelly breath and had a white fluid coming out her mouth yesturday. It's midday and when I felt her crop it felt like a waterbloon, but doesn't seem too swallen. She seems quite happy and is eating and drinking (I've feed her yoghurt, grit, acv and water and bread soaker in olive oil) we are also trying to treat her lice and her bum is also very red, bald and swallen looking which she has had for months. Also I don't think she is laying. If she does have sour crop what do I feed/do with her?