We are incubating Modern Game, American Game, and Silkie eggs and I would like to vaccinate for Marek’s when the new chicks emerge. Our local vet does not vaccinate chicks, but she recommended that I can order the vaccine online. Problem is that apparently the vaccine is only good for about an hour after it’s been reconstituted, and we’ll have chicks hatching on different days. What to do? If you vaccinate your new chicks, can you advise me as to how you go about it? TIA!!