Is your vet willing to learn more about chickens, do necropsy and send tissue samples to lab? Or it might be worth the drive to know for sure.I have not had one done. The state lab is a bit of a drive. The situation is feeling quite dire. I've read that , about the birds being carriers. I am worried if indeed it's marek's, they've like all been exposed. And I've read even those vaccinated can still get sick if exposed. I'm looking for any answers that can put an end to this. Is there an end to this?