Wow, do yourself a favor and read the comments section since the Project Officer, tracking antenna designer, a co-worker of one of the engineers, and a trajectory dynamics engineer for General Dynamics. They all dispute the one comment saying the bears were hurt / destroyed although the chimpanzee was slightly injured.
It's bit controversial anyway cause another comment tells a different story altogether:
'''According to the government white paper on the subject all bears were destroyed shortly on return to base. All but the last three bears suffered serious internal injuries and multiple broken bones. 'Several hundred' bears were acquired for this purpose, all of which were destroyed 'in or after the testing process, by the testing process or by gun shot to the heart to preserve cranial damage from impacts'.'''