My swcah daughter (two year old) also drinks excessively. So much infact that I took her to the doctors last week because of it. She begs me for juice and milk all day. She doesn’t like to drink just water so I mix all her juice and milk with water, making 3/4 water- 1/4 juice. She has now started getting up two times in the middle of the night for it. And she also gassles it down. The doctor has ordered blood test and urine sample to check for ?? We are still waiting for results. I will let you know if it is anything. I hope we all can find a cause for this. Besides worrying about what might be wrong with her, it is somewhat frustrating getting that sippy cup of water/juice every 15 min. or so and especially getting up all night.