Agatha is still low, for now I'm putting it down to the egg laying situation because she laid another soft egg yesterday and the calcium caused more problems because I had to pull out a very soft shell. Plus she's been in the clay too much so that too could likely have created even more problems
I have just ordered Hefar Sulf and I'm

this will help a little. I may have done wrong but I've found activated charcoal has help all of my animals in the past and it helps against metal and chemical poisoning as well as fights bacteria so I administratored a little of this in water as well as cleaned her and put a little honey in her vent. Electrolytes water is always here for her.
I came across this site
http://www.poultrydvm.com/views/symptoms.php that may help us to answer a few problems we are coming across daily