Could leg weakness be a disease?

[faithweaver]

I am the one with the 13 week old hen who is unable to walk. She was vaccinated for Mareks and Coccidiosis. Even though she was vaccinated, can they still get Marek's disease?

 

[Judy]

I have read here that they can, that it is not a single disease but a group of them.

 

[threehorses]

Can you post your original post's link, please? Rather than double the posts (so that no one's post gets lost and thus people don't get help) I'd rather answer there.

Thanks!