Due to very sensitive skin of my baby, she's been drinking soy milk (Abott) since 4 months old.
My baby's weight has been gaining well. When you start to introduce solid food to your kid after 6months, baby will gain most nutrients from other food. So no worry at all!
And my paediatrian also said cow's milk is not as good as we thought it should be. Of course mother's milk is the best, and soy milk is good too.