mystery food dyes

Ben came home Friday with a grumpy, defiant attitude that went on and off all weekend. He said that he ate a sugar cookie at school and the teacher and parent must have lied to him about there being food coloring in it. He was quite adamant about it. Unfortunately, I was pretty irritable too. I started tracing back the foods Ben and I both ate. The only thing I could come up with was the salad we had at McDonalds Thursday night. The southwest Salad isn't supposed to have any food coloring, but the Oriental salad grilled chicken glaze has red #40. Maybe it was something else completely. Who knows for sure. It just seemed to have all the same problems. Hopefully it's all worn off by now.