I hope someone has a quick solution for us. We are new to raising chickens and one of our Red Stars began hunching over and not moving around, also had a dirty vent area. We gave her a bath to clean the vent and mites started floating to the top of the water. We treated her with pyrethrin and a couple subsequent baths/treatments. She was still not recovering (it has been over 2 weeks), so I bought some antibiotic and separated her from the rest of our 7 chickens (all well and unaffected). Her latest bath yielded just a couple mites, dirty water from her still dirty vent, and I noticed she has a severely swollen abdomen. She threw up mostly water when we gently squeezed the area- What do I do now? Please forgive my ignorance, but I have looked everywhere online and cannot figure this out! Thanks for your help.