It states on nhs website
Formula fed babies under 6 months of age may need small sips of cooled boiled water during hot weather as well as their usual milk feeds.
what age would be okay for cool boiled water? My babe is only 9 weeks but tends to want more milk during the hot weather, then is clearly over fed as he’s sick a lot and he’s never usually a sicky baby. I’m wondering if it’s just because he’s thirsty not hungry?