I'm sorry to hear about JosieShe got worse. Wouldnt eat at all. Couldnt walk still left leg & right one tired so she sat alot vet put her to sleep. sad. Now a rooster walks but acts as if he has forgotten how to eat or drink! Legs shake at times. 70s here warm day. He is also 9 months old silkie mix. the other was leghorn. he is on meloxocam also. No improvement 10 days. pic was a month ago. I hope not mareks. he will not eat from my hand, acts so scared! he will bend down as if going to eat & then turn away.
The rooster that is not well now.
What do you feed, including treats?
The symptoms you describe sound neurological, so you may be dealing with Marek's. Acting scared, can he see very well?
I'd try vitamin therapy, give him 1/4 tablet B-Complex daily and 400IU Vitamin E. A treat of egg daily can help with the uptake of E.
I'd feed him an all flock or chick starter feed if possible.
If you lose him, then consider sending the body to your state lab for testing/diagnostics. This can help you know what's going on and if there's any treatment that may help.
https://www.metzerfarms.com/poultry-labs.html