It's not likely to be mareks.
Since she's vaccinated, it's unlikely to be showing these symptoms even if she had it.
Keep up the vitamins and unless she has a malformation or a stroke, she'll get back to normal.
Is this all one pill? What i.u or mg is she getting of each of these? She doesn't need calcium right now.
Vitamin deficiency can show up over night but it takes weeks to get back to normal