Thanks for the query to H.C.M. Forum.
As baby is on lactogen and overweight
but the cause of concern is puffiness over face .
She is also passing green color stool which is also a cause of concern.
May be due to .
1 Nephrotic syndrome
, diagnosis can be confirmed by urine culture and sensitivity test , M R I of both kidneys .
and liver will be helpful.
In my opinion consult a urologist
and get his opinion as this is a cause of concern .
3 Weight gain may be due to over dose of lactogen and lactogen reaction , so at present breast feeding is the best . Stop extra diet .
Consultation with a urologist and another child specialist will be helpful ( 2nd opinion).