hi mam my daughter immunity is very low ... she doest gain wt.. her wt is 7.3 and bw is 3 kg she got 5 teeth she looks too slim but she is active stand and take 4-5steps without support.. but que is that she is not digesting any kind of milk and she poops after every feeds after 2hr ,4hr I switched off her fm now she is doing poty atleast 3-4timea .nit a problem but problem is her wt.. pls suggest mei what to do for her wt.. increasing immunity.. and which kind of milk I will give to her thanku