I have both ordered chicks with vaccines, and without, and never had a problem with either. I also have newly hatched chicks about 2 weeks old, and they have no vaccinations and seem to be fine...I think with a smaller flock its easier to keep everyone healthy...I guess it all just depends on what you are comfortable with, if you feel better getting them vaccines do it, but mine have been fine without...I have heard of the use of apple cider vinegar added to the water helps prevent something, but I dont remember what, sorry! not much help??!!