i do not know if u heard about exclusive breast feeding program .it means to give yr baby only breast feeding for the first 4-6 month of his/her life, which recommended by WHO and many health authoreties.
my advice to u, do not give more that breast milk unless u have problem with breast feeding then u should consult doctor or even if u in doubt u should get help from yr doctor who will follow u and yr baby. and alot of details will be given to u which i can not say to in chat.