my chicks were purchased at the feed store and i thought they were vaccinated for merek's. i called the feed store today and they weren't. they are now 5 weeks old. a friend has 2 more chicks for me, but they are vaccinated and i read that you can't have unvacinated chicks around those that are. i really want these chicks so i am wondering if my chicks are too old for the vaccination or if what i read was total bull in the first place. does anyone know?