I would say that doesn't sound like very good advice, but there are a lot of doctors who (wrongly) believe babies should be significantly decreasing formula or breast milk as soon as they start solids. It's not good advice and it's not evidence-based but it is a very old school way of approaching it. How is your friend dealing with that advice? I mean, of course, ideally she should be doing her own research, but many people do take doctor's word as the word of God and don't question it. Obviously, ultimately it's her responsibility to make good choices for her baby, but if you're concerned you might just mention casually that you read all babies should be fed milk (dairy free or not) on demand until age 1 and ask if it's different for those with a milk allergy. Or you can be very passive about it and post something on Facebook if you're friends with useful info. I wouldn't probably say more than that though. If she believes that's what she's supposed to do and won't hear otherwise, you probably won't change her mind by making a case out of it unfortunately. It's definitely worrying though.