My daughter is 35 days old. Initially the doctor had suggested similac plus stage 1 for her, however i have heard Nestle Nan pro is better. Hence I switched to Nan pro 2 days back and notice that this formula is lighter than similac and my daughter was able to feed on more quantity. However yesterday she pooped almost thrice, not sure if this is due to change in the formula or because she is feeding on more quantity. Any suggestions if i should switch back to Similac or continue with Nan pro?