My flock has Marek's, I have gotten around a dozen birds from TSC and none of them ever showed any symptoms of it. The store I got them from claimed they were vaccinated against a whole bunch of things, one of them was Marek's. From what I can tell they were not lying. It is possible that all of them were just lucky and did not show any symptoms but that is unlikely, more than half of the birds I hatched this year either showed symptoms or died from Marek's. I will do some more playing around with TSC birds this spring and see if the birds really are vaccinated from the stores around here.Feed stores can be a good place to buy a few chicks, but you will need to know what you are doing first. Be able to ID breed types, at least, and realize that those inexpensive chicks will not be vaccinated against Marek's disease. That's done buy special order only, or when you have it done by the hatchery that you order from directly.
I'm not so concerned about getting some cockerels, and usually order straight run, because I know that my boys will have nice lives, even if short. Do you ever wonder what some hatcheries do with all those extra cockerels?
Be reasonable about ordering chicks so they are shipped during reasonable weather!!! If it's winter in the north, or super hot summers in the south, things won't go well.
Mary