My 15 month old little boy only averages around 6-8 oz of fluid (milk included) per day. He doesn't have really wet diapers but his skin turgor seems okay. If I try to force him to drink it makes it worse. He does not have an ear infection, and we've tried all types of cups and drinks. Do some kids not require much fluids? I have noticied that he is definately more irritable lately as well.