A few times over the past couple of years, my daughter (now 5 yrs old) has woken up in the morning complaining she doesn't feel well, tries to eat breakfast, no fever, but ends up vomiting once or twice, then is completely fine by lunch time and is usually starving for lunch and ready to play... (There is no sign of the previous day's meals when she throws up by the way) This happened this morning and I realized we had salmon for dinner last night. Could it be related to the salmon or is this too late to be a reaction?