I'm sorry for your loss.
Can your vet send him for necropsy? Hopefully that would give you better answers.
thanks.
there is no avian vet here. that's why I never take for granted when he says something. it looked to me more like IB. I took 1 pullet that was in his flock to the vet and she is fine. the pullets have been vaccinated for IB and not for MG. it looks like a sort of proof that he died from IB or other than MG. we have a lot of wild birds around.