Not sure about the nappies hun and J is a bit older, but he was coming home with dry nappies all the time, and was skulling over one bottle of water when coming home so I said something to them about it. She said they regularly offer water in the kids bottles they have there but now that I have said something it hasn't happened again (coincidence?) but it might be worth mentioning and asking how much he is having if he seems to be very thirsty and dry.