Oh by the way so sorry to hear about your little chook. Glad the other one is doing better.
I have been told Yokult is good for them but so is Berocca.
I had a chook feeling poorly ( I know yours is a lot different and worse )so I gave her some Berocca and it helped her with the TLC regime.
You can get a ceramic globe from your pet store the ones they use for reptiles.