Yeap that is what the Vet said, plus any feathers can harbor the MG virus for 3 to 4 months. Also in a back yard flock MG free is next to impossible to have. He also said depopulating is a waste of time and money because of that and people! The best thing to do is treat when they show signs of being sick. Easy enough I guess. placed my order for "clean" birds for the New Year!!
I couldn't catch the game bird but took the 2 Silky Roo's 1 alive and the dead one. Actually glad I did, the live one was showing signs of being sick. swollen eye. Watched the necropsy. Very neat.
The Dr with the USDA lab was very helpful and the anatomy class was great. So now I only have 2 ducks and 1 game chicken left from my friends. My original flock is doing great, still molting and very spotty egg production, but as long as they don't die I am happy and can handle the lack of production. If there is anything different that is bad I will post it. But right now it looks like bad birds with multiple "bugs".