R is 14m and still wakes up at 4-5 am several times a week. He typically goes to bed at 7:30. I let him fuss for a bit, but if he doesn't go right back to sleep will give him a bottle, and he'll go back down for another few hours. Should I just be letting him CIO at this point? 5 am is so dangerously close to wakeup time that I worry he'll just stay awake for the day (and wake his brother up in the process). WWYD?