Lexi does not like to drink water, I offered her a couple times, but she made a disgusted face and refused lol GP recommended to give her water for her poo troubles (sometimes she won't go for 8 days or so, but is not really constipated).. I agree with the poster above that water won't cause any problem with eating as it is quickly absorbed and baby won't drink it if it does not need any- it just replaces what is lost because of heat or some other reason. If baby seems thirsty and drinks happily then offer it, by all means.