Would like to check whether anyone give lo drink water when lo is 5 months? I understand if lo is fully BF you don't need to give them water but what if lo is half BF and fm ? Do you give lo drink water and how much?

It is not recommended to give water to babies under 6 months old. Usually water is introduced when the baby starts solid to help minimize the chances of getting constipation if I'm not mistaken. It is not recommended to give young babies water as it is void of nutrients, and could easily fill a baby up. So even when water is given to babies older than 6 months, only small amounts should be given to prevent the baby getting full from water and refusing regular food and breast milk.