Help for Rosie

Our Rosie needs a healing touch. Poor girl has been sick for 4 days every morning I'm thankful she is still alive! We are hand feeding her a liquid diet and /vitamin water every hour and won't eat much of it at all. Maybe 5-10 spoonfuls a day :/ I am keeping her in the house. She's such a sweetie! I hate to lose her. If anyone has advice to help her, I would so appreciate it. It started with her having chicken lice. We treated the lice, I bathed her in lavender oil today and I don't see any bugs on her anymore. Her vent is pretty chewed up and her under side is very raw/red. She won't open her eyes unless I make her. I don't know what else to do.