I'm so sorry the necropsy came back the way it did.
All you can do now is wait and watch. You have to remember that vaccines are not 100%. The current fight with Covid is a prime example of how this works.
The fact that your flock is vaccinated will give them a degree of protection against...
@kerthomp I am so sorry you lost your hen. When all is said and done it is the last gift of love that we can give to a beloved pet to let them fly free with grace and dignity.
I am also so sorry to hear about your diagnosis. You are not alone. I have been dealing with Marek's in my flock for...