The tendency to allergies is inherited but specific allergies are not. So if you are allergic to feathers, don't automatically assume that your child's allergic reaction is also to feathers. A tendency to allergies continues throughout life, but your child's sensitivities and reactions may well change. During a child's first eighteen months, food allergies are most common. Most allergists feel that breastfeeding may be best for babies born into families with a history of allergies.
Some allergists recommend up to two weeks between each new food.
If your baby has a reaction, omit the new food for two weeks to see if the symptoms improve or disappear. If they do, double check by starting the suspect food again. If the reaction reappears, eliminate the food and see if the symptoms improve. Be patient, because the improvement may take several days to appear. Foods that can cause problems for sensitive children include cow's milk, wheat, corn, tomatoes, soy, peanut butter, strawberries, and eggs.