Food Safety Report: Culver’s, 96th Avenue North, Maple Grove, MN, USA 6 months ago • details 6 Suspected food poisoning. Symptoms: Nausea, Stomach Pain, Chills, Headache Suspected source: Culvers Onset: Less than 4 hours Duration: 4 to 12 hours Sick: Me Ate at 12:30, and started feeling like this at about 2.