Some people who attended a Thanksgiving Day dinner in northeast Iowa last week got more than a free meal. Over 700 people showed up for the annual dinner last Thursday at Cedar Heights Presbyterian Church in Cedar Falls. A local Hy-Vee food store catered most of the meal. But for some who chose to spend the holiday at the church, eating the dinner may not have been a good thing. The church’s pastor Cathy Young says about 100 people got sick after the dinner. Local health officials don’t know if the food catered by Hy-Vee caused the illnesses, or if it was something else. Black Hawk County health inspectors are trying to pin-point the cause.