I have a question about mixing chicks. I have 14 vaccinated chicks from a reputable hatchery and tonight I'd like to pick up 5 polish chicks from a local farm won most likely will not be vaccinated. Both sets ate the same age, about 1 week old. Now my 14 vaccinated ones are being fed a non medicated feed and I'm unsure what to do about the 5 tonight? Can I brood them together? Feed them unmedicated feed? Do I need to worry about them getting sick or am I putting too much thought into this?