5:48!?!? that is the funniest thing I have ever heard.
Keeley is a late sleeper compared to some of your pups. He sleeps until like 10:00. Even on the nights he sleeps with us. He'll just sleep and sleep and act all put out when we talk and get up. He'll look up at us and then kind of get this little "umph" sound and turn to get more comfortable. It's so funny.
After we had a scary hypoglycemia incident, I leave food available to him all the time, I think he sneaks some in when he wakes up and we don't even notice. But I figure he knows when he need to eat and if he does he'll go get it. Maybe when he is older and more predictable I'll start feeding him on a schedule, but right now I just let him follow his stomach.