There is an article in the breastfeeding/bottlefeeding section about babies being misdiagnosed with lactose intolerance instead of cows protein intolerance, also discusses how doctors arent really sure what to do and how to spot it. This is because lactose is found naturally in milk, and pretty much no babies have true lactose intolerance. Soy isn't recommended for boys or in general either unfortunately... maybe print off some of the articles I posted in those areas so she can make a more informed decision.