Sick Hens

[jcooper3]

It might possibly be Marek's disease. Search this site for the thread titled "Great Big Giant Marek's Disease FAQ" and consider if your bird's symptoms match those discussed in the thread.

 

[jcooper3]

I see you have been giving them B12, but have you been giving them B2? Riboflavin is B2 and a deficiency can cause neurological symptoms in the legs.