I didn't know I had Marek's in my flock. When those 10 chicks died, that's when I realized I had it. To save your chicks from Marek's, you need to buy an incubator (a cheap one is fine), wash them and put them in. Even if you take them out after birth, they will have already been contaminated.
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However, if your eggs are from your flock, and your hen is from your flock, those chicks will have resistance to Marek's. So far, I had not lost any that way, seems the exposed moms pass on the resistance to the chicks. You say the eggs are from your own hens. It might be okay, I hope it goes well!!!
OR
However, if your eggs are from your flock, and your hen is from your flock, those chicks will have resistance to Marek's. So far, I had not lost any that way, seems the exposed moms pass on the resistance to the chicks. You say the eggs are from your own hens. It might be okay, I hope it goes well!!!