I posted yesterday about my lil 2 wk old silkie and ya'll said she may have Merek's. I started her on Poly Vi Sol last night. She's not doing well at all. I think she's having seizures. I'm trying to get her to drink the medicated water often but she's very week. She was in the brooder with 9 others and I have med in their water too. How long do I need to keep med in their water?