The feedstore I bought my first two chicks from said they were vaccinated for Merek's (sp?) and I am feeding the medicated chick starter feed... The two silkies I bought from a different feedstore didn't mention anything about vaccinations and I didn't even think to ask...just called them and they have no idea and don't think they are, because they never ordered vaccinated chicks or thought they could...(FYI ~ they seemed like numb nuts on the phone) SOooooooooooooooooooo here are my questions: 1) What should I look for to keep my chicks healthy (both sets) 2) Can the vaccinated chicks get the non-vaccinated chicks sick or visa versa? 3) Can I do anything about it now? or is it too late? 4) What causes Merek's? 5) Please offer any suggestions, thoughts, etc re: having two that were vaccinated and two that weren't all together in one happy family coop.... Thanks!