Hi Michelle & Daisy,
I did not feed my #1 n #2 with water until they started on cereal @ 4th month. Our breastmilk already contain a lot of water.
For newborn, its not encouraged to drink plain water cos they have very small stomach. If u are on tbf n u feed water, the baby's stomach will be filled with water and they may not want to latch on. As a result, ur supply will drop. So feeding of water is not encouraged for tbf babies. For formula fed babies, a bit of water is fine after each bottle feed cos formula is heaty n the baby may constipate.