Del, thank you for the update! My stomach has been in knots over your flock.
Instead of antibiotics, what about tons of fresh oregano and garlic? Both have such good antibiotic properties. I don't blame you for not wanting to use regular antibiotics.
There are a number of other great herbs that cleanse the liver (Milk Thistle, dandelion root, Turmeric and Globe Artichoke). While it may take a few days to find the others, Turmeric can be found at any grocery store. You can probably start it right away without being worried about its safety for your birds.
Please keep us posted when you can - I know you've got your hands full right now.