I am wondering about food allergies for my 19 month old daughter and what we may be able to do. Just after eating supper a few nights ago, she had a greenish colored horrible smelling diaper and was crying in pain even before I started changing and wiping her. Her skin was very red and irritated. We wondered if it may have been caused by something she had just had for supper. One of the items she ate was a salad with chopped up Snickers. Last night after having one piece of cake that may have had tiny nuts chopped up, she continued to swallow for 10 minutes after.