we have travelled from USA to India my baby there was on similac 360 total care formula we bought her formula from USA to India but after reaching here she started to be lactose intolerance to the formula and now she is on isomil soy based formula I want to know how long she will be like this and how should we introduce her to regular formula . she is 9 months old going to be 10 soon also she eat less solid and less milk her weight is 8.2 kg