WRT the comment about formulas being dairy: It's also worth bearing in mind that many leading allergists consider the introduction of dairy based formulas, particularly in the first 4 months, to be the single biggest risk factor (after genetics) for allergies. There are certainly other risk factors too, and it's not so cut and dried that you could say no formula, no allergies, however the risk has been shown to increase by around 2 1/2 times if dairy formula is introduced within the first 4 months. To me this is a sign that introducing dairy is something that should be carefully considered and not rushed.