The similar testing done on the B-1A used frozen turkeys as I recall. (That launcher was sure a fun project.)
Don't remember if they were thawed or not, but I'll never forget that Fickle Finger Award we got from the Smothers Brothers about it.
They were thawed. There’s a fairly infamous story of the Brits reaching out to advice on the test methodology. They kept destroying planes and couldn’t figure out what they had designed wrong. The instructions they had for the test didn’t tell them to thaw the birds so they were basically sending rocks at the plane instead of bird strike equivalents.
UVV, I also worked for General Electric Aircraft Engines (now GE AViation) in Evendale, Ohio (outside Cincinnati). I worked with several people, including my manager who previously worked in the stealth department for the B1 project in Columbis, Ohio. We called them the Rockwell Mafia :)
Not that it is important, but the Fickle Finger of Fate was given by Rowan and Martin's Laugh-In, not the Smothers Bros.
I should think they must have thawed the turkeys. Otherwise why not just use a bowling ball.