I used to give nan pro 1 to my child since breast milk was not forming in sufficient quantity..then one day my 2.5 month old baby cried alot becoz of stomach pain. ..when I took him to doc he changed formula milk to " similac isomil" for 21 days.. yesterday 21 days completed...so from today onwards I started giving " lactogen 1"..just 3 feeds since morning and he cried a lot due to stomach pain .. can I give him "similac isomil" soy. milk for next 3 months until he turns 6 months old... please guide...does soy milk contains all the nutrients...and it's fine to continue with isomil milk