Dairy is certainly a controversial food group. It's potentially highly allergenic. It's also relatively difficult for the human gut to digest. Goat's milk is better because, like humans, goats have one stomach, whereas cows have three!
Basically, I'm doing what's practical and what feels right to me. I've never seen goat's milk for sale. So I have a choice between infant formula - which is processed food made from cow's milk - or cow's milk itself, which is at least natural and made for a baby animal.
As for soya milk, which I used to drink exclusively (growing up, my brother was asthmatic and allergic to milk; I got used to drinking soya and actually preferred it), I've read that it produces estrogenic effects in babies, so that's a no-no. And instinctively, I was already gravitating towards milk made for a baby animal over milk made from a plant.
I agree that adults should minimize their dairy consumption, but I'm more relaxed with my baby's consumption, as she needs the fat for her growing brain. And Nim just loves her organic cow's milk!
Re. eliminating dairy, it's definitely a good idea to try it if you or your baby are unhealthy. That idea of the IAHP's of marking the calendar and seeing after 6 weeks if there's been an improvement is a good one. But as long as we're healthy, I don't see a reason to cut out dairy.
If it's just to be on the safe side, then yes, you can take things in pill form as a substitute. But nutrients in supplements are never as efficiently absorbed by the body as the nutrients in our food.
Also... my husband and I really love the occasional cheese plate when we go out for dinner!