Tylan though used to treat mycoplasma, is also used in some cases to treat enteritis, an intestinal disease.
I tend to agree with @rebrascora and think that Mareks may be very possible. Initially, in my first post, that was something I thought about, but wanted to see a video of her walking. Mareks can cause a lack of immunity, where common illnesses can cause problems.
If you lose her, I would get a necropsy by the state vet to look for Mareks and other diseases, since that can affect your other chickens in the future. Here is a link where you will find contact info on state vets and poultry labs:
http://www.metzerfarms.com/PoultryLabs.cfm
I tend to agree with @rebrascora and think that Mareks may be very possible. Initially, in my first post, that was something I thought about, but wanted to see a video of her walking. Mareks can cause a lack of immunity, where common illnesses can cause problems.
If you lose her, I would get a necropsy by the state vet to look for Mareks and other diseases, since that can affect your other chickens in the future. Here is a link where you will find contact info on state vets and poultry labs:
http://www.metzerfarms.com/PoultryLabs.cfm