Food Safety Report: Kincaid's Hamburgers, North Kimball Avenue, Southlake, TX, USA 1 year ago • details 51 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Chills, Headache Suspected source: Lunch at Kincaids Onset: 4 to 12 hours Duration: Several days Additional information: My son is sick too.