The Area 10 Agency on Aging distributes hundreds of gifts and necessities to homebound seniors each holiday season.
Thieves took the catalytic converters from the vehicles over the Labor Day weekend, putting two Hoosier Hills Food Bank trucks out of commission.
Police say the crime was like many others in recent years, with thieves searching for materials they can fence for cash.
Would-be thieves have been electrocuted in the process of trying to harvest copper from air conditioners or electrical boxes that were still live.