Excellent!
Well, not excellent your birds are sick,
but that you got the results and have 2 pros to talk them over with.
I suppose you'll share these results with the NPIP farm you got the birds from?
Also, Kudos for sharing this here, a great education and documentation of us here at BYC!
What kind of tests were done on which birds?
It's possible that the new birds came down with something already in your flock that they were not used to being in contact with and were susceptible too in the stressed state of being in a new place. Just a thought. Hopefully it all balances out and...