My boys always sleep through the night. Bedtime is about 11:30 and wake up time is whenever me or my fiance wake up. The only time they get up in the middle of the night is when they are sick. One night the smaller older puppy was crying like crazy in his crate. I just thought he was whining to get out, turns out he had diarrhea! So mommy no longer ignores middle of the night whines