I too vaccinate all my chicks for Mareks... It is my opinion.. that more people are keeping chickens for pets and paying good money for imports.... The buyers and the chicks deserve to be protected. I certainly vaccinate all my puppies.. so why wouldn't I do the same for my chicks. So far... have not found Coccidia to be a problem as long as I put dried powdered milk in the feed once in a while.I just wanted to make a suggestion on the new babies. I would ask your breeder if he vaccinates for Marek's (probably not what they died from as they were too young) or Coccidia. I vaccinate for both and on the more fragile breeds or more susceptible breeds in general (imports in particular) it is a life saver but must be done at a day old. The vaccine is CoccivacD (new one is coming out in September CoccivacD2).
Good Luck,
Nellie