WHY has DS become wolf-boy at 2yo?
Every 15 mins or so during the night he emits a blood-curdling howl or sometimes a prolonged groan, occasionally just a mid-level grumble. They all wake me up. Sometimes they even wake him up. 
He was a noisy sleeper as a newborn but this has been a fairly new development in the last couple of months.
I'm exhausted. What the blardy hell is going on?