I am going to be ordering 3 chicks from my pet chickens .com. They asked if I wanted the vaccine for maricks disease. My question is, what if I get a few more chicks elswhere and they are not vaccinated against this, will they get this disease because the other chickens carry the antibodies in their blood? You ask, why wouldn't I just order them all from MPC? I want to have a couple EE chickens who lay green or blue eggs and maybe a salmon favorelle for a tinted egg. The other 3 I would be getting at the neighborhood school spring hatch for their science class. I sort of like the idea of not knowing what kind they are and have it be a suprise. Please let me know about vaccine and if my other chicks could get this because they are not vaccinated!!! I have never owned chickens and am really excited about this new experience!!!! sandyj "citychicker"