Haven't spoken to a doctor. Hadn't thought to.

My husband claims he only peed about 5 times total from Kindergarten through Highschool during the school day. He didn't like to pee at school (might miss something). I don't pee all that often either. We drink plenty here...just prefer to hold it and make the trip worthwhile :-) So it is completely possible she just doesn't need to pee often.

Not sure I could increase her liquids. I could try juice (which she normally never has at home) but she gets milk or water at meals and snacks and isn't limited in any way.