Re: water for breastfeeding babies: someone on MN linked me to this article a long time ago, and I have saved it carefully:
here. Johns Hopkins is an extremely well-respected hospital and research institution, so I am happy to accept their counsel not to give undiluted water to little ones.
If you can't access the link, the crucial bit of the article is:
"Too much water dilutes sodium in the blood and flushes it out of the body, thus altering brain activity, which can lead to a seizure. Infants under 1 year of age may be more prone to these types of seizures than older children because a young infant?s diet does not contain enough food sources to replenish the lost sodium. Also, an infant?s immature kidneys cannot flush out excess water fast enough, causing a dangerous buildup of water in the body.
"Breast milk and formula are the best way to keep a child under 1 year of age who is not eating solid foods hydrated, Walker says..."
Terrifying!
FWIW, when DS was about 2 m, we took him somewhere very hot, and he was feeding like a little madman (on advice of my HVs and so on), and didn't require any of the bloody tea and water the relatives kept pushing him to have. (eejits - the tea is just an obsession with them; we had manky left-over camomile tea all over the effing house). He hopped up a whole centile line!
And I lost at least half a stone in two weeks
!