I remember that story. It showed up in Aviation Week & Space Technology along with with a high speed camera shot of a chicken blasted out of the cannon enroute to an F-15 windshield (canopy). The picture caption ended with the rather cryptic summary "...it did not survive."
The next issue's Letters to the Editor was packed with reader questions on whether they were talking about the chicken or the windshield.
They were supposed to thaw the chicken first.