Allergies

Denise
I didn't know where else to ask so I figured maybe some mommas here can help. A few weeks ago my daughter had an allergic reaction after dinner. She had been out with her dad grilling before that too. She broke out in hives and Benedrly worked fast. At the moment I am not sure if it was her food or a bug bite that made her react  to it. Should I give her the same food she had that day and see what happens or just avoid it all together? She had the same brand nuggets, Tyson, but they were different kind, she usually has Dino nuggets that time she had chicken nuggets. Idk if maybe an ingredient was different. My husband and I don't have any allergies. Help please! TIA